The ocean is one of the most mysterious and terrifying places on our planet. Estimates state that about 80 to 90% of the ocean, particularly the floor, is completely unexplored.

Take a look below at some of the most haunting and unsettling videos of the ocean found on the r/thalassophobia subreddit.

1. Taking the plunge

This video from 2023 shows an experienced scuba diver plunging down into a spring off the coast of Florida.

2. Tossed around in a storm

Concerning video of a large ship getting thrown around in the Southern Ocean. video taken just a couple days worth of travel away from from the Antarctic Circle.

3. Skating on perfectly clear ice

Although the ice in this video may look thin, its actually about 6-7 inches thick. Clear ice like this is the strongest ice per unit thickness, meaning this ice could likely support vehicles as well as the skater in this video.

4. Snorkeling in the rain

Snorkeler surfaces from under the water in the pouring rain, the perfect weather to be under to go snorkeling in.

5. Kayaker meets manatee

This kayaker accidentally startles a manatee, causing the other nearby manatees to also get spooked. despite their size, manatees are much more afraid of humans than we are of them.

6. Disappearing into the foam

Man and his dog disappearing into the foam built up on a beach. Foam build ups like this are most commonly caused by by algal blooms.

7. Underwater hotel

Video of the famous underwater hotel in the Maldives, with room prices ranging from 14,000 up to 50,000 Per night.

8. The water log

A water soaked log, commonly referred to as a dead head. These are a hazard for boaters especially in murkier waters, as they float just below the surface of the water and can absolutely destroy the hull of water craft.

9. Big wave beach

A massive wave on Ventura Beach wipes everyone out, forcing them to move away from the beach.

10. Small boat, big wave

A stolen boat gets wiped out by a large wave at the mouth of the Columbia River. The boat thief was thrown from the boat and later saved by the coast guard.

11. Watery abyss

Scuba diver swimming out into what can only be described as a watery abyss.

12. Big ship, bigger waves

A ship getting jostled by waves in Drake Passage, one of the most dangerous voyages for ships to make.

13. Feeding the fish

Boaters throw away raw meat overboard in the deep ocean, attracting the likes of a whole host of different aquatic life.

14. Triple water spout

Boater spots not one, not two, but three separate water spouts while at sea. Definitely not your every day occurrence.

15. Shark denied

Scuba diver casually preventing himself from getting bit by a shark multiple times, making it look like just another normal Tuesday out in the depths.

16. Stormy ocean at dusk

Spooky video shows what its really like to be out on the ocean during a storm. One must truly feel like they are at the full mercy of the weather.

17. Bridge begone

A bridge getting swept away by an overflowing river in Assam, India.

18. Open sea swimming

Open sea swimming in the Indian Ocean near Mauritius. Certainly must feel isolating yet freeing at the same time.

19. Tide coming in

Video of the tide coming in fast on a stormy night in Manasquan, New Jersey.

20. The work of a cyclone

Huge ship left ruined and abandoned after a cyclone, displaying just how powerful nature can be.

This was just a small bite of the mysteries of the ocean, and how unsettling it truly can feel when you remember how only about 10% of the ocean has truly been explored. It really makes you think about what could be lurking in that remaining 90%.