Most of Earth’s surface, 70 percent, to be exact, is covered by the ocean. There are a lot of secrets that these waters conceal as humans have managed to explore just 5 percent of what lies on its floor. The unknown is always frightening, so let's look at what we do know, as the deep waters are quite fascinating, although they can give us the creeps sometimes.
These facts were shared by curious Redditors whose minds were boggled when they learnt them, so Bored Panda collected the most intriguing ones in this list from threads you can find here, here and here. If you would like to learn more creepy facts about the ocean, you can read this article and you may also be interested in this one where divers and fishers share their scary experiences.
#1 Greenland Sharks Are Reported To Live Up To 500 Years

Image credits: teaandcrumpets_
#2 The Famous Blobfish Photo Was Taken After Ut Skin Was Torn Off And They Normally Don't Look Like That

Image credits: rubberbandballgaming
#3 Lobsters Are Effectively Immortal

Image credits: MintyLotus
#4 'corryvreckan' Is The Third Largest Whirlpool In The World

Image credits: Applesintheorchard
#5 "Shark Spotters" Don't Spot Every Shark Nearing The Beach

Image credits: TheSaddestLittleBoi
#6 Most Of Earth's Oxygene Comes From The Ocean

Image credits: i_R_drunk
#7 The Biggest Ocean Garbage Patch Is 3 Time Sthe Size Of France

Image credits: RSPanther
#8 The Sailfish Is The Fastest Fish In The Sea Reaching The Speed Of 68 Mp/H (110 Km/H)

Image credits: CodeDragon7
#9 There Are More Artifacts In The Oceans Than Museums Combined

Image credits: Back2Bach
#10 The White-Sand Beaches Of Hawaii Are Made Of Parrotfish Poop

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#11 Some Species Of Tuna Are Going Extinct

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#12 The Tallest Mountain In The World Is In The Pacific Ocean Called Mauna Kea Measuring 33,497 Feet (10,211 M) From Its Base To The Peak

Image credits: Stormcell74
#13 The Pacific Ocean Is Shrinking While The Atlantic Is Growing

Image credits: Kothophed
#14 At The Bottom Of The Ocean You Would Feel A Weight Equivalent To That Of 50 Passenger Planes

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#15 Hydrothermal Vents Are Home To Crustaceans And Worms

Image credits: Earthpig_Johnson
#16 There Is A Height Difference Between The Atlantic And Pacific Oceans

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#17 Most Ships Cannot Survive Freak Waves

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#18 Sea Cucumbers Account For The Majority Of Biomass On The Abyssal Plain

Image credits: Zyklozylum
#19 The Top 10 Feet Of The Ocean Hold As Much Heat As Our Entire Atmosphere

Image credits: Bilgistic
#20 The Bottom Of The Ocean Is Covered In Dead And Decomposing Organisms And The Feces Of Living Organisms

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#21 We Know More About The Moons Surface Then The Oceans Floor

Image credits: kenworth117
#22 A Tiger Shark Can Be As Long As 18 Feet

Image credits: big-enchilada