Divers Reveal 50 Disturbing Discoveries Underwater They Will Probably Never Be Able To Explain

Despite its size and impact on life on Earth, the ocean remains one of our biggest mysteries. In fact, more than 80 percent of it has never been mapped, explored, or even seen by humans.

Drawn by this mystique, Reddit user ThatPizzaGuy5150 made a post on the platform, asking: “Divers and water lovers, what is something you’ve found while underwater that you can’t explain or scared the hell out of you?” Turns out, many more people wanted to hear the answers—the post has received over 3,400 upvotes.

And all of these folks got what they desired. From curious sharks to missing persons, continue scrolling to learn what you can discover when you descend into the unknown.

#1

Divers Reveal 50 Disturbing Discoveries Underwater They Will Probably Never Be Able To Explain I was diving off the Florence, OR coast with some friends and we found a body on the ocean floor in the creepiest condition possible. He was a surfer who’d gone missing a few days prior so he wore a wet suit with his legs, arms, and head exposed. Crabs had eaten the flesh from his exposed bits so basically he was a torso with a skull and skeletal limbs.

The creepiest dive of my life though, two buddies of mine and I were on a night dive in the Pugeut Sound hunting prawns. It was about 1am and we’re a good 100ft deep, the pitchest black you could imagine. We used to do this thing on night dives where we’d get in a circle, turn off our lights, then stir up the water and watch the bio-luminescence float around us like floating stars in a black watery space. Beautiful. Only this one time we turn off our lights, stir up the water, and the water glows just enough to reveal a fourth person sitting in our circle.

We were at a dive resort so it wasn’t so odd to see another diver, only it was 1am–we’d seen no one else prepping a dive at the dock. He was also alone which was odd considering the dangerous conditions of a night dive in those waters, and he had no fins or gloves. I don’t know how he swam so well without fins or didn’t get hypothermia without boots or gloves. We wore drysuits because it was so cold but this dude was in a wet suit with exposed skin and we thought we saw a giant gash in one of the legs.

So the three of us all notice him and we’re too f*****g scared to move, I can hear my buddies panting in their regs, and the guy just smiles and waves, then swims away.

That was 100 times creepier than skeleton dude. Whenever you think you’re alone and someone just shows up, like in an alley at night, it’s weird as f**k. 100ft under water at night is terrifying.

pteam-pterodactyl , Pixabay Report

Camilore

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19 hours ago

That’s some serious disturbing encounter. Good that you are ok! The sea is more of a Twilight Zone than we think

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#2

Divers Reveal 50 Disturbing Discoveries Underwater They Will Probably Never Be Able To Explain I don’t know if this counts but I’m a water lover, so maybe so.

While water skiing in the lake one time (Louisiana) when I flew off I landed like pretty much on top of an alligator. I kinda felt my leg hit him and we were like eye to eye when I gasped for air. Then he went under. The moments after that were the most terrifying moments of my life because I was so certain Id feel him bite my foot any second and drag me under. I started screaming and couldn’t stop until the boat was back to me.

You don’t realize how long 2-3 minutes is until you’re alone in the open water.

Never again for me.

tsim12345 , Big Cypress National Preserve Report

Camilore

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19 hours ago

And never for me

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#3

Divers Reveal 50 Disturbing Discoveries Underwater They Will Probably Never Be Able To Explain Surfing off the West Coast of Vancouver Island. Sitting there waiting for waves when this big dark shape slithered underneath me and my board. I quickly went to a kneeling position on my board with an audible ‘holy s**t balls.’

moments later the friendliest face poked up out of the water in front of me. A big curious Seal. Curse you Seal….you scared the p**s out of me that day.

viperfunk , Elianne Dipp Report

Hope Springs

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14 hours ago

Your fate was … Sealed 🤐

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#4

Divers Reveal 50 Disturbing Discoveries Underwater They Will Probably Never Be Able To Explain I was diving of the coast of manly island, near sydney, on my gap year. We were told to stay away from caves and whatnot because common sense, what with sea snakes and such. Me and 3 friends jump in and swim for a bit. We’re were at the edge of a reef and just checking out some coral and junk. Me and another guy swim to the very edge of the reef to check out the deeper bits (not going down too far of course), and swim past a small crevice. It was so small we didnt even notice it. I turn my back to it for a bit to check where the other guys are and my buddy starts shaking the begeezus out of me and is franticly pointing towards the crevice. I turn (already expecting a demon or some monster) and squeezing out the crevice comes this f*****g enourmous blob of maroon flesh and suckers. At this point i wet my pants (no lie). So basically it was a octupus with the arm span of a paddling pool and it lunges and the other guy, squirting him with ink and dissapearing. I thought it was gone cause i couldnt see s**t. I saw his arm flailing out of the blackness and i thought he was swimming to safety and i was ready to get the f**k out of the ocean forever. From a distance i saw that the octopus had him by the right leg and was groping him in a mass of inky horror. I had no idea whether or not to help him, i had never been more scared because i knew octopus can kill people. I was so scared i could barely breathe. I tried to go help him and when i got close to him the octopus scarpered further down into the reef. I had never seen a man look so frightened in his life. He swam so fast up to the boat with me in pursuit and the guy didnt need a ladder to get up to the boat, he just breached the surface and hoisted himself by his arms on the edge of the boat. I called the driver over and he ran over. My buddy had a chunk of flesh the size of a tennis ball out of his calf. He still has marks from the suckers (those mofos are strong). To this day he has never even been to the beach, and he’s even scared of baths.

anon , Morten Brekkevold Report

Stuart Griffiths

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14 hours ago

F#£k that!!!

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#5

I was diving in bermuda, 85 feet down, coming out of the wheelhouse of an old fishing boat. I felt something start tapping my hand, turn my head with thoughts of all kinds of horrible terrifying sea creatures reaching out to grab my hand and see a tiny little fish flinging itself into my hand and waving it’s fins at me as if to say “get out of my house! go on scram!”

That was when I discovered you could laugh through a regulator

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Sutton Williams

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14 hours ago

The relief you must of felt must have been incredible!

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#6

Divers Reveal 50 Disturbing Discoveries Underwater They Will Probably Never Be Able To Explain Rescue diver in the Bahamas… [I was] diving in a submerged blue hole (the entrance is below sea level) and a diver went missing.

After an hour or two of searching, went back into the blue hole to see if there were any signs of him. Saw the glint of his watch and his arm sticking out near the bottom.

Start descending down to the bottom to recover the body. On the way down realized that the “bottom” was a school of sharks that must have been there for breeding. So many sharks that they blocked the view of the actual bottom.

Descended into the darkness, grabbed his arm (couldn’t stand to look at the body) and started ascending. The sharks followed. And were circling the both of us. Had to take a break halfway at around 65 feet as to not get the bends. Scared sh*tless. The entire time waiting to normalize scared sh*tless. He was struck by a passing boat.

keithbah , Elgin Renz Rocili Report

Camilore

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19 hours ago

So sad

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#7

Divers Reveal 50 Disturbing Discoveries Underwater They Will Probably Never Be Able To Explain I grew up diving, as my family owned a dive shop. I’ve dove all over the globe, but the thing that creeped me out most happened on my local lake. I was about ten, and had taken our ski boat from the dock to a secluded cove to look for an abandoned cemetery (the lake was created by TVA in the 30’s and displaced an entire town, leaving several places like this lost in the trees with no access). When I got onto the shore, I found a blanket with all the edges tied together to make a bundle. I didn’t open it, but did some exploratory poking. There was obviously a cinder block in there, and the rest was just squishy. After a particularly vigorous poke, blood started seeping through the blanket. I hauled my little a*s back to the boat and never looked back. Decades later, I still think about that and wonder what was in there.

On a lighter note, our shop got a lot of business retrieving dropped items and speed boats that idiots would sink. My dad was the shop’s master instructor and normally passed these jobs on to me or one of the regulars. However, he took one job in January to test his new dry suit and took along one of his friends. I was their gear-tote, and waited on shore. Dad came up first, and started telling me about this weird looking fishing lure he’d found while sifting through the silt. About that time, the buddy surfaces and asks dad why he was playing with that tampon for so long.

I had an awesome childhood.

warwatch , Kay Atherton Report

PeachyPenguin

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15 hours ago

bro couldve solved a missing person case or something

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#8

Divers Reveal 50 Disturbing Discoveries Underwater They Will Probably Never Be Able To Explain I was diving a spear fishing spot about 30 miles off shore. I was 60 feet under water. There I was swimming along when I noticed them a school of Mahi Mahi. There were about 30 maybe 40 of them. These fish where all between 2 and 5 feet long. They were so beautiful with their sides flashing all different colors. That’s when I felt the tug on my leg. I looked down at my legs to see a 12 tiger shark pulling on my dive fin and taking me along for the ride. In a second he had ripped the fin off my foot. The shark then swam away but kept circling just at visual range. I think he was still curious about how I tasted. I kept an eye on him the whole time I was swimming back to the boat. Scariest moment I have ever had in the water.

EnderWiggin3rd , Diego Sandoval Report

Stuart Griffiths

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14 hours ago

And f@#k that too

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#9

Divers Reveal 50 Disturbing Discoveries Underwater They Will Probably Never Be Able To Explain I was leading a group of 8 students on a night dive off of our liveaboard dive boat in Egypt. Every few minutes I’d turn around and just make sure everyone was still there and hadn’t gotten lost.

About 30 mins into the dive, we all settled onto the bottom in a circle to turn off our lights and check out the bioluminescence . After we turned our lights back on I scanned the circle quickly to count everyone.

Kneeling off to one side of the group, alone, with no dive light, 45′ underwater with no other boats in sight on the surface, was a single unknown person – fully geared up, breathing steadily, and making eye contact with me.

I panicked a bit right then because I had NO idea who the f**k this person was or where they came from or what they were doing down there… and so I did the only logical thing: lead my group back to the boat, and never mentioned it to any of the kids.

Still creeps me out.

orodruinx , Mitchel Wijt Report

Camilore

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19 hours ago

Was it the same person from the story above? Who knows? Dark waters are mysterious and haunted by some very disturbed and lost souls…Anyway, very scary stuff 😬😨

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#10

Years ago I was having a fun day snorkeling in the lagoon in Diego Garcia. On the way back across the lagoon a pod of dolphins came up and were jumping around the boat. Shut off the motor real quick and jumped in. I’m pretty good – usually dive down 15-20′. It was amazing… Dolphins all over the place. I went down about three times. Next time I went down.. Nothing. I looked around… And then there they were. Hammerheads. Hundreds of them. All around me. Blood went cold. Panic sets in. Some small… Some as big as me (over 6′) some were just monsters… I didn’t panic – slowly drifted back up to the surface. When my head broke the water I suddenly realized that I was surrounded by death incarnate – and couldn’t see a single one. I’ve never felt fear like I did in calmly trying to climb back into the boat… It was amazing. It was incredible. It was utterly horrifying….

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Sian E

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14 hours ago

The dolphins were using you as a sacrifice to the sharks!

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#11

My grandpa was in the Royal Australian Navy during the Vietnam War. They were taught to shake the hand of dead sailors when recovering the bodies to make them more comfortable and familiar with handling a dead body. On my grandpa’s first recovery dive, he shook the hand of a dead sailor and the arm came off the body. Had to keep his cool and bring the body up, but still pretty messed up.

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Hill Branda

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5 hours ago

I’m laughing only because that is ALL kinds of f*cked up

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#12

Divers Reveal 50 Disturbing Discoveries Underwater They Will Probably Never Be Able To Explain I was diving with some friends and found a fisherman’s glove with a hand still inside it. We brought the glove to the local police and they told us that they hadn’t received any kind of report of a guy with a missing hand.

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Minath

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15 hours ago

Now the police have a hand with a missing guy.

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#13

I was snorkeling in the Bahamas when I came across a barracuda that was at least 2 metres long. Eerie looking creature, just sat there with its teeth poking all grumpy looking. Turns out after speaking to the locals, this particulate barracuda is called Henry and these waters have been his territory for years.

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skwid 🦑

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10 hours ago

That’s kinda cute that they named him

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#14

Divers Reveal 50 Disturbing Discoveries Underwater They Will Probably Never Be Able To Explain On one of my night dives at the Flower Garden Banks Marine Sanctuary in either 2005 or 2006, had my first encounter with a Beaded Sea Cucumber. I thought I stepped out of the real world and into a science fiction/fantasy world seeing this long worm with tentacles surrounding it’s mouth like a cross between a snake and an octopus. Very scary initially, now I look for them because they are pretty cool.

On a more recent dive (this spring), although I knew I was going to see it (the whole purpose of the dive after all), finding the 3 year old 80 lb golden lab that had been swept away in the spring floods and trapped in debris under a bridge scared the heck out of me when I first found her body visually. Knowing you are looking for it, and actually finding it are two different things. But at least I was able to bring her body home for her family.

SeasDiver , Vlad Patana Report

Minath

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15 hours ago

Poor doggo, that’s so sad.

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#15

This was a long time ago, but okay. It was a training dive under the ice: Enter via a bubbler keeping ice from a ferry, swim out to a sunken wreck via lines, stick to cave protocol the whole time. Five tank dive, each, with mixed gases and O2 for decompression. On the way back, well over 90 minutes in the water, [a fellow diver’s] reg explodes into a free flow.

No problem: Swap onto another, kill that tank at the valve, stow it and keep going. Two minutes later it happens again. No problem – we keep going. Then again. Sh*t is serious now, and we’ve all got extra regulators at the ready. Buddy is getting a little shaky, and suddenly he hits his drysuit inflator and flies upward.

We followed as fast as we could without blowing our deco and endangering more people, and pass through a cloud of blood. Found him wedged in a crack about five minutes later, already gone.

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Sarah Bell

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11 hours ago

That’s terrible. Do you have any idea why that kept happening. I’m nit a diver . Can anyone explain what happened in a different way . I mean I get the gist but would like to understand more .

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#16

It was my first deep wreck dive, and I was venturing in the hold of a sunken fishing trawler. At the bottom of the dark hold, I found a full size skeleton. My wife and dive buddy freaked out, and swam straight into the wall. She dropped her dive light, which settled 20 feet below between the skeleton’s legs.

I dove down alone to get it, because SCUBA gear is expensive. Up close, that skeleton was an obvious plant.

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Olivia Lisbon

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10 hours ago

I’m not sure practical jokes are appropriate that deep underwater…

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#17

Divers Reveal 50 Disturbing Discoveries Underwater They Will Probably Never Be Able To Explain This happened when I was doing my 2nd dive on the entry level course to a scuba diving organization (I can’t recall the name).

So we’re about to descend to the ocean floor to do some basic exercises (e.g. letting water into your mask and getting it out again). My friend, let’s call him Daniel, was the first diver that descended all the way with the instructor, but when his flippers touched the ground there was a hidden wobbegong shark. He hit it, and it RUSHED towards and bit Daniel in the thigh. Daniel was scared and ascended WAY to quickly (ascending to quickly without proper “form” can kill you). He was scared shitless, and so was I as I was right next to him. I grabbed his calf and tried to push him down and he kinda realized what he was doing. At the moment I was scared, but 10 minutes later on the boat we nicknamed him “The Shark Tamer” – everything really does want to kill you in Australia huh.

Fnuzilla , Richard Ling Report

Stuart Griffiths

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14 hours ago

In fact f@#k all these posts can’t look down the list any more afraid for life of all water except the bath

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#18

Surfer here. Grew up in Southern California now live and surf on the east coast. In the outer banks area of North Carolina, there are tons of sharks which are usually not aggressive so I have no problem surfing around black tip sharks and such. Was out on the water for a sunrise surf session when a fifteen foot manta ray literally jumped over me. His (her?) wing slapped me on the back and knocked me into the water and all I could think of was how Steve Erwin died and I literally crapped myself.

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Donkey Pandaaaaaaaa

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14 hours ago

Now I want to know how Steve Erwin died

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#19

Divers Reveal 50 Disturbing Discoveries Underwater They Will Probably Never Be Able To Explain Divers in one area of Honduras took to feeding an eel. It was a big a*s moray eel, and it got to like divers, because they always gave it food.

One day I was on a dive and nobody gave it food, and the dive master didn’t really mention it. Next thing you know this tame moray eel is swimming furiously after a half dozen divers, and they are scared as s**t. I hovered about 20 feet above them and watched the mayhem unfold. These people all thought they were going to die, but really that six foot moray eel with razer sharp teeth only wanted his doggie snacks.

bellevuefineart , Derek Keats Report

Cat Palmer

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18 hours ago

And this is one of several reasons why feeding wildlife like this is not a good idea.

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#20

Divers Reveal 50 Disturbing Discoveries Underwater They Will Probably Never Be Able To Explain Down in La Jolla California, they have caves along the coast that you can swim through, if the tides are right. This particular day the water level was high enough that you could swim through this one cave that was pretty narrow. Well, it’s my turn to swim and when I’m half way through a set wave comes in and clears the cave while I’m still in it. I was smashed against the side of the cave, bloodied up the back of my shoulder pretty good.

But we’re thinking, well s**t, we just got in the water. We were planning on swimming out to a buoy and then back to shore. So I just say f**k it, let’s do it, exposed wound in an area known for Great White sightings, no big deal, gotta get a work out in!

Well we get to the buoy and I just have the biggest sense of dread. We’re probably a good 15 minute swim from shore and I start thinking about this wound on my arm just leaking shark bait into this giant vast ocean full of stuff that probably wants to eat me. Sure enough, I’m looking down and I see something swimming towards me, it’s dark. I’m like what the f**k what the f**k what the f**k and I started swimming away from it, and I turn around to and I see two more of the same things coming at me from different directions. My face goes completely white, I’m expected to get grabbed and pulled under and never seen again. Nothing happens.

My friends can see the look on my face and they’re asking me what happened. We all decide to swim in together. My friends were all better swimmers than me, but on that day I beat them all back to the shore easily. I’m practically kissing the sand when I finally made it to the shore and this old man comes up to me and says:

“You shouldn’t be swimming with that cut on your arm, you’re attracting sharks!”

anon , pxhere Report

Gaya Knust

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11 hours ago

Jesus, that was one stupid decision! Luck was on that person’s side that day!!!

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#21

While in Egypt I decided to go snorkeling in the ocean.

Water was maybe hip deep and I am floating around just enjoying the view and the atmosphere, when I come by a sea anemone.

Not expecting anything bad, I just want to float by, when this freaking Nemo (clown-fish) attacks me and hit’s my goggles.

I am so scared, I scream, which is a bad idea as screaming under water leads to water in your lounge, leads to almost dying, until I finally remember to just freaking stand up and take a deep breath.

Stupid fish scared the air out of me.

Nemo is a ruthless killer, do not let the movie tell you otherwise.

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SerumSeven

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16 hours ago

I hate it when I get water in my lounge.

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#22

Divers Reveal 50 Disturbing Discoveries Underwater They Will Probably Never Be Able To Explain Bodies.

One summer at my cousin’s lake house, my cousins and I were out swimming and at one point my sister started screaming bloody murder. All the adults jumped into the lake to drag her out.

Turns out she had just had seaweed wrap around her leg. What our parents hadn’t told us was that a man had drowned in the lake and his body hadn’t been recovered yet. He washed up on our shore the next day.

Still a little scared to swim in that lake.

2ndcircle , Tom Pottiger Report

Gawaget The Object Thingy

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11 hours ago

When I was a kid, maybe7 or 8 yrs old at the time, we were visiting Carlyle Lake in Illinois. While we were swimming there was a big commotion the park rangers showed up all the adults and us kids linked hands and walked together looking for something. I didn’t know it at the time but a little girl had gone missing they found her the next day her hair wrapped around the buoys that mark the boundaries of the swimming area

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#23

Divers Reveal 50 Disturbing Discoveries Underwater They Will Probably Never Be Able To Explain Went snorkeling off the coast of Mozambique near an island when a dugong swam right under me. It was MASSIVE. I literally peed myself.

dontwanttostop , Julien Willem Report

Gaya Knust

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11 hours ago

Dunno what a dugong is, but judging by the picture they look cute!

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#24

Divers Reveal 50 Disturbing Discoveries Underwater They Will Probably Never Be Able To Explain Drift diving in Sulawesi, Indonesia and I glided over at least a dozen human skulls in a distance of about 30 yards.

anon , nationalgeographic Report

Ronda News Channel

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14 hours ago

Where is the exact location? On 1 January 2007, Adam Air flight 574 crashed into the Makassar Strait near Polewali Sulawesi.102 people on board died.

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#25

Divers Reveal 50 Disturbing Discoveries Underwater They Will Probably Never Be Able To Explain Well I definitely *don’t* love water, but here’s mine:

Was down by the beach, was around thirteen. My brothers and I went down there to play a lot around then. There’s a seagull, they’re pretty common around there, flies down to the water to grab a tasty fish. Well, it must have misjudged the size, because whatever it was grabbed the seagull and dragged it under water.

Dunno what it was, but I didn’t want to play in the same water as it.

ArsenalOwl , Tina Nord Report

Norman Woelk

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7 hours ago

Probably a Muskie.

#26

Divers Reveal 50 Disturbing Discoveries Underwater They Will Probably Never Be Able To Explain I was diving in Thailand and we were at a site diving where there were two steep hills underwater full of rock formations, coral etc. Between these two areas was a sandy bottom with scattered rocks ranging between the 1-5 meters across, all full of holes and full of life.

Were were swimming from one hill to the next and inspecting these rocks along the way. I was swimming along one large one when I get wacked in the side of my stomach very hard. It startled the s**t out of me and I quickly back off. The dive instructor noticed and came over and we inspected what happened.

That’s when we a gigantic moray eel (I’m later told it was a Giant Moray). He was absolutely massive, never seen one so big. Was easily a couple meters in length and was probably as wide as my head. We assume I had passed too close without noticing and he attacked, he hit my BCD and luckily didn’t persist.

gloriouspenguin , Derek Keats Report

Lee Macro

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19 hours ago

When you swim in the sea, nearly lose your BCD that’s a moray

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#27

Ok here’s a fun one, made me feel like a b***h at the time, but now I look back and laugh.

Snorkeling on the gulf side of Mexico, just after high school. Had set up a day beach, good location, water dropped to about 20 feet deep just a short distance off shore. Things are going well, we’re seeing just HUNDREDS of fish, small school of puffers (didn’t even know they schooled), which scared a few people.

So at one point, I’m just swimming back up to the shallow beach, and turn around to swim backward, when I see… I don’t know, 6-12 of these small fish, white bodies with yellow fins, RIGHT off the end of my flippers, swimming HARD. Like, chasing me. Moments later I’m scrambling up on the sand like a shark is right on my a*s. Did that whole “look around to see if anyone noticed me being a fool” thing. In retrospect, they probably liked the current I was generating with the flippers or something, I know they weren’t dangerous. There’s just something truly freightening about so much smaller than yourself being aggressive or chasing you.

TL;DR Chased by tiny, probably harmless fish while snorkeling, scared the c**p out of me.

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Chloe Drury

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10 hours ago

This one is nice!

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#28

I was snorkeling in a decommissioned canal when on a family vacation in Canada. I was in 12 year old heaven, as everything I lifted had large crayfish under it. I go into a rhythm of lift, grab catch, lift grab, catch, when I saw a weathered log. I sprayed bubbles into the clear water when I realized the “log” was actually the tail of a gigantic snapping turtle.

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Hutt'nKloas

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6 hours ago

Damn lucky. Never good to mess around with a large snapping turtle!

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#29

A little late but here I go.

I was 8 or 9 yrs old, snorkeling in Florida at sunset maybe 6-8 ft from shore 4-5ft of water. There were huge schools of smaller fish swimming right up to the edge of the shore break, we’re talking thousands of fish, and I noticed that if you dove under and swam against the sand the fish would envelope you in a shiny silvery bubble. It was beautiful and honestly enchanting and I got lost just doing this. On one of my dips underwater, im just going along the bottom when suddenly my bubble opens dead ahead and all I see is long sharp teeth, a giant dark eye, and something much larger than me grazes over my back. As fast as it happened, my bubble is my own again and I stand up and haul a*s out the water.

Turns out it was a large sand tiger shark (9-11ft) patrolling through the bait fish.

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SobyKay

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54 minutes ago

whoa!

#30

Divers Reveal 50 Disturbing Discoveries Underwater They Will Probably Never Be Able To Explain So I’m in Cancun, Mexico with my host family (exchange student). There’s this hotel that’s surrounded by a river thingy that you snorkel in.

I can’t sink (lol thanks, body fat) so I don’t have a life jacket. I’m about a mile of swimming into the river when I see something interesting at the bottom.

I struggle downwards (the water was maybe 9-12 feet deep?) and I see it’s a conch shell! What a perfect present for my younger host sister, it’s her birthday today and she’s love it!

I keep trying to swim to the bottom, only to get pulled back up, over and over by my own mass. It’s been thirty minutes and I have a headache. I’m not going to give up that easily.

I manage to get a hand on the shell, and pull it toward me! Victory!

I have a sudden sharp pain on my stomach. I drop the shell in surprise, and I see a little blood coming out of a new wound. I swim to land, and investigate the mark on the shore.

The wound was bizarre, shallow but in a shape that looks like the bite from human molars. I’ve been pinched by crabs plenty of times, and this looked nothing like a crab pinch. Didn’t feel like one either.

I couldn’t figure out what was living in that shell. I scoured the internet and my zoology textbook, but nothing matched my bite marks.

To this day, I still don’t know what bit me.

anon , Dimitris Siskopoulos Report

Donkey Pandaaaaaaaa

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14 hours ago

I can’t remember the name but there’s a poisonous sea creature that looks like a conch shell and shoots a tiny harpoon-like sting with poison in it that’s enough to kill it’s prey but not affect humans. Maybe it was that?

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#31

Scariest thing for me when diving was the first time I was truly in some deep water. Diving the Bloody Bay Wall in the Caymans, we go through a cut in the coral and the next thing we know we are spit out of the wall into the open ocean. Looking down you can’t see the bottom and then I remember, this is the start of the Cayman Trough which goes down a little over 25k feet. Was a very primal fear that made me feel I should not be here.

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Aniviel

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8 hours ago

Of all the nopes I’ve read so far, this is the nopest!

#32

When I was taking my navigation portion of my PADI advanced certification, my instructor had me swim out from the wall into the deep blue, all while swimming completely by compass. While I was on my return swim a remora attached itself to my stomach causing me to spit out my regulator, inhale water, and freak the f**k out. The scariest part was that I had swam far enough from the wall that the instructor and the dive group could see none of this happening. Luckily I did the proper regulator recovery before I inhaled too much water and drown. The remora did end up following us the rest of the dive. So, at least when we got topside and I told everyone what happened they believed me.

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ethan kraner

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8 hours ago

say it with me T.H.I.C.C.

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#33

Divers Reveal 50 Disturbing Discoveries Underwater They Will Probably Never Be Able To Explain I swam out into the middle of a lake in northern Wisconsin on a warm summer day. I was floating on my back, just relaxing. After a bit, I started thinking about how deep the water was, and then about a horror movie I had recently seen that featured a giant monster bursting up through the water in a lake not unlike the one that i was floating in.

I started to feel kind of nervous.

Suddenly, I heard the most god-awful roar as if the lake was exploding beneath me. Terrified, I bolted up to tread water only to see the trailing smoke from a SAC fighter jet that was practicing flying under radar.

Travesura , Jess Loiterton Report

Nimues Child

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9 hours ago

Oh, man. Low flying jets have roars that come out of nowhere and shake you to your core!

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#34

Divers Reveal 50 Disturbing Discoveries Underwater They Will Probably Never Be Able To Explain Not sure if this counts, but I learned to scuba dive in False Bay while on vacation in Cape Town a few years ago. Not even a week later, a man was eaten (not just bit!) by a “dinosaur sized” great white in the same area we were diving. I’m sure this sounds dramatic but I haven’t dived since and probably never will. I get goose bumps just thinking about it.
Witnesses described the terrifying scene. The shark was “longer than a minibus”, Coppen told the Cape Times newspaper. He said: “It was this giant shadow heading to something colourful. Then it sort of came out the water and took this colourful lump and went off with it. You could see its whole jaw wrap around the thing which turned out to be a person.”
News article about the attack:

http://www.theguardian.com/world/2010/jan/13/cape-town-giant-shark-attack

Penelope2124 , GEORGE DESIPRIS Report

LeeAnne B

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12 hours ago

False Bay is a common sighting area for Great White sharks. There is actually a cordoned zone where swimmers are allowed. Perfect place to spot a shark.

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#35

Was doing a drift dive down in Mexico. Saw a VERY large grouper off in the distance. Let myself drift towards it. I soon realized it was far bigger than I had thought and I was putting myself in danger (possibly). This thing could have taken me down too far or damaged my gear or knocked me out. I’ve seen videos of these things eating 4 foot sharks. And this bad boy was bigger than the ones in the videos. I was a bit shaken after that dive.

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beldar

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2 hours ago

Giant grouper probably the only predatory fish that could swallow somebody whole, although ive never heard about it happening. Course if it did nobody would know unless they witnessed it

#36

Divers Reveal 50 Disturbing Discoveries Underwater They Will Probably Never Be Able To Explain I was scuba diving with my family in hawaii. We were pretty deep, im guessing like 25 feet under water, when the lady in front of me kicked out my breathing mouth piece. I had just blown out all of the air in my lungs so im deep under water with no oxygen and not a whole lot of time to react. So i start clawing for the surface frantically. As i was going up i felt this horrible expanding feeling in my chest. It was the scariest moment in my life. One of the instructors popped up a minute or two later and said she didnt expect me to be alive or concious or something like that. I went back to the hotel pretty shaken up and cried a little bit from sheer terror. It was a rough day

Old_Dirty_Badger , BC bubbles Report

Corey Smith

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16 hours ago

25 feet is not deep. Did you not have a backup regulator (or “breathing mouth piece'” as you call it)?

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#37

I was diving off the coast of Fiji and we went through a natural tunnel (like a 10-meter cave/passage through a rock formation). So we start swimming through the cave and suddenly the light was weird, like the blue tint from the water has been replaced by a red one. Now all divers will know that this isn’t only weird because the color changed but also because red is the first color to disappear after a certain depth (usually between 30 feet and 40 feet), and we were over 70 feet deep. Also bare in mind this was late morning on a sunny day.

So imagine this scene: Me and my dive buddy are going through an underwater cave and suddenly everything, for no apparent reason, is tinted red, a color that you are literally supposed to be unable to see while diving at that depth during the day.

Upon exiting the cave, everything was back to blue. I thought it was just me so I didn’t signal to go back up. After the dive my buddy asked me if I’d seen the water tint red too. We can’t explain it and the folks from the local dive shop had no idea what we were talking about.

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#38

I was out doing my job one time in the absolute darkness of the void. I had been out a good 30 or 45 minutes when I saw something swish over the top of my vision really fast. I looked around, couldn’t see anything. Spooked me good and so I just focused on my tactical breathing and not losing my fingers. A minute passed and I saw something go a little behind the pylon and down.

I was 100% sure it was a kraken or some sh*t. Another minute passes and then this 2-or-so-foot fish comes swimming up to me. Weird looking motherf*cker. Pale and long and skinny with BIG eyes and a bigger mouth. It just kind of darted around me for a bit, just hanging out with me while I worked. When I was done, he took off.

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Kim Shannon

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13 hours ago

I think you just met your on site supervisor

#39

Divers Reveal 50 Disturbing Discoveries Underwater They Will Probably Never Be Able To Explain Not a diver, but my dad is a PADI instructor and used to run a small diving business.

He has hundreds of awesome pictures that he has taken while diving, but he told me a few weeks ago that when he was In Tobermory, he went to a wreck and found the exact dive camera he was using, and it looked pretty new on the floor of the water.

Apparently he noped so far out of there.

Oh and he’s seen like creepy s**t. Like dolls, and creepy old antiques and s**t

RogueToasters , pxhere Report

Tess the ferret

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17 hours ago

The camera, was it creepy bc it was new and abandoned so there was something wrong there? I’m so confused 😂

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#40

Divers Reveal 50 Disturbing Discoveries Underwater They Will Probably Never Be Able To Explain I did find a bag full of cat bones once… we were pretty perplexed about it. We brought it up and found a cross and rocks in the bag. I’m assuming (hoping) it was a burial of a loved family pet and not the alternative.

SupervisorEric , MATSUDA Akihiro Report

#41

Was snorkeling a few hundred meters off shore in the Cayman Islands when I stumbled upon what i thought where two big a*s sharks just chillin. Michael phelps would’ve been jealous of the speed I was swimming back to shore before I realized that they weren’t actually sharks but rather two average size tarpons. Great time

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Tess the ferret

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17 hours ago

Bahaha who else read tampons😂

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#42

I was like 8-9 and snorkeling in hawaii. I turned around in only a couple feet of water and a turtle rammed me full speed in the face. Scared the hell out of me and broke my goggles. Dunno what the hell it was doing

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Tired_Panda

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6 hours ago

Ngl that’s kinda awesome

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#43

Divers Reveal 50 Disturbing Discoveries Underwater They Will Probably Never Be Able To Explain South Floridian, here. I grew up fishing and diving, which has led to a few notable stories. The one that sticks out the most was during my high school years. I had just taken a deep breath and gone down to a reef about thirty or so below. My friend was still on the boat above and we were the only ones on the reef. I got down to the bottom and noticed a thin upright pole. Upon closer inspection it was indeed a normal fishing pole, but old and rotten under the water for so long. Right as I was going to grab the pole it was pulled from my hands, just shooting up and away, as if being reeled in by the other side. It was gone within a matter of seconds, so i started my resurface expecting to see another boat responsible. No boats, nothing in sight, but of course just my friend and his boat. I never bothered telling him, because he would have never believed me anyway. The only explanation I might have is that the pole was still attached to a fish or something, although I doubt it. Still gives me goose bumps thinking about it.

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K Sarfo

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15 hours ago

The never ending dread of non decomposable fishing lines.

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#44

Divers Reveal 50 Disturbing Discoveries Underwater They Will Probably Never Be Able To Explain I was snorkeling in the Caribbean and I got separated from the rest of the group. We had be sticking close to the shore to look at the small fish and things. Touristy stuff. I stayed behind to look at a small school of fish and when I looked up they were all way ahead of me.

To catch up, I took a shortcut across deep water. I was swimming along for a while, not seeing any fish or anything, when I just saw a murky outline in the distance. You know, when you’re looking at something underwater from a distance and its just a shape? Like that. But it was huge. Easily bigger than me. Just slowly swimming parallel with me.

I didn’t take the time to investigate it closer and just swam to shore as fast as I could. Still gives me chills when I think about it.

Yeti_Hairball , dailymail Report

Sutton Williams

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14 hours ago

I think we all know this was a whale right?

#45

Probably not the story OP is looking for, but still scared me!

I do recreational scuba diving with my grandfather, nothing too deep I think we went to ninety feet once. We have only dove twenty or so times and nothing too recent due to my grandfathers buoyancy issues. When you go diving one of the first things you want to do after getting to depth is attain your buoyancy so you can control your depth through you breathing. My grandpa can do this just fine, maintains this state is an issue for him. Whenever he takes a deep breath and starts floating up he dumps his air, starts falling to the ocean floor, and then pumps his BC full of air again causing him to float up even more. This is a huge problem.

So most of our dives went well and this wasn’t a huge issue, but when we were on vacation in Cozumel he scared me to death. We were doing a reef dive (40-60 feet) having a good time when he starts fidgeting with his buoyancy. Next thing I know I see him float up nearly to the surface and then come crashing back down to my level. A few minutes later he goes soaring back up this time reaching the surface and all I see is I’m flopping about the waves. Now I don’t know how easy it is to get the Benz or how easily this can kill someone, but seeing him just flip around on the surface freaked me out. The worst part is I’m 50 feet down and helpless to do anything.

When we finally got back to the boat he was puking, but nothing else ever came of the incident. That was the last time we dove and as much as I enjoyed sharing the experience with him I don’t plan on ever diving with him again.

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WatermelonTheDutchie

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6 hours ago

wait i thought it was called the bends

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#46

Was diving off Gloucester north of Boston and saw what I thought was a blanket spread on the bottom. It looked like there was something under it so I went closer thinking I’d see what was under it. When I was about a foot away I realize it’s not a blanket with it rises up and faces me. It’s a very large [torpedo ray](https://en.wikipedia.org/wiki/Atlantic_torpedo). These are a member of the electric ray family and can generate enough charge to render a human unconscious. I almost swallowed my regulator. Fortunately he wasn’t aggressive and I just backed away slowly with my heart pounding rapidly.

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#47

I was knee boarding one time in a lake not too far outside of my home town. The water is very murky and dark. Well the front end of the board dipped downward in to the water but I kept holding on to the rope. I shot probably a good 20+ feet deep in a matter of a couple of second and when I let go I completely lost my place it space. It was pitch black and I couldn’t tell if I was right side up or upside down. Didn’t really “find” anything scary but being that lost in space is truly terrifying. Started buying more buoyant life jackets from that point forward.

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#48

Guns… dozens and dozens of guns. Rotten stock and rusted closed, but there are certain spots locally where I can bring up as many as I can carry just about every dive.

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#49

I was about to go on a night dive along the GBR outside of Bundaberg when I couldn’t get my wireless watch to sync to my tank, so I waved my dive buddies on telling them I’d catch up later. I finally get the watch to sync and check in with the dive master and leap off the boat into the black water. I am really good at going down fast so I sink to the bottom and then shut off my flash light and start swimming to the divers in the distance. Night divers are not hard to find as they are the only source of light, so I keep my flashlight off and swim through the darkness towards the group.

Every once in awhile I shine my light around to see landmarks and keep on a decent path. I started using a small coral outcropping as a guide. Just as I come upon it I shine my flashlight only to scare the p**s out of a shark that I only get a strobe like glimpse of as my light bounces off its snout and in a huge rush of bubbles going tearing off into the black. I calmly try to maintain my breathing so as to preserve my air and slowly swim to the group.

I thought it was a nurse shark. I kind of still do. But I found out the next morning a tiger shark was curious about us and hanging around since the late afternoon. We ended up seeing it the next day as it swam around us in the distance. And then we even watched it attack a turtle for a half hour during lunch. So it may have been that bad boy I ran into in the pitch black ocean.

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#50

Me and a buddy of mine were diving the Edmonds Oil Pier in Washington. We’re cruising along and he points his light out into the murkiness that is Puget Sound. I see this white streak in the distance. Both of us drop to the bottom and get behind one of the pylons and watch as a pod of orcas goes by.

If we had been in the open water, we would have been a tasty morsel for the pod

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Mirt

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8 hours ago

There is no record of an orca ever killing a human in the wild. They are actually part of the dolphin family, not sharks, maybe that has something to do with it? I don’t know. I just watch alot of National Geographic.

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