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Ocean Facts
570 facts in Ocean. Click any fact to see its full page.
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✨ Tester 1
Sea pigs are deep-sea relatives of sea cucumbers that walk along the ocean floor on tube-like legs.
The peacock mantis shrimp can see ultraviolet and infrared light and has 16 types of photoreceptor cells.
Sperm whales can dive to depths of over 7,000 feet and hold their breath for up to 90 minutes.
The flamboyant cuttlefish is one of only three known venomous cephalopods and walks along the ocean floor instead of swimming.
Male anglerfish are tiny parasites that permanently fuse to the much larger females, eventually sharing a circulatory system.
The leafy sea dragon is so well camouflaged that it is nearly invisible among seaweed.
Cone snails have a venomous harpoon-like tooth that can kill a human, but compounds from their venom are used to make painkillers.
The bobbit worm buries itself in the ocean floor and ambushes prey with jaws so powerful they can snap fish in half.
Flying fish can glide through the air for distances of over 650 feet using their enlarged pectoral fins.
The sunflower sea star has up to 24 arms and can move at a speed of 40 inches per minute.
Beluga whales are sometimes called sea canaries because of their wide range of vocalizations.
Decorator crabs attach sponges, algae, and other organisms to their shells as camouflage.
The chambered nautilus has remained virtually unchanged for over 500 million years.
Hagfish produce enough slime in minutes to fill a bucket and can tie themselves in knots to escape predators.
The mimic octopus can impersonate at least 15 different species by changing its shape, color, and behavior.
Brine pools on the ocean floor are so salty that they are toxic to most marine life, creating an underwater 'shoreline' effect.
The yeti crab, discovered in 2005, grows bacteria on its hairy claws and uses them as a food source near hydrothermal vents.
Xenophyophores are giant single-celled organisms found on the deep ocean floor that can grow up to 8 inches across.
The zombie worm, or Osedax, feeds on whale bones on the ocean floor by secreting acid to dissolve them.
Black smokers are hydrothermal vents that spew superheated water rich in minerals, creating chimney-like structures on the ocean floor.
The deepest fish ever recorded is the Mariana snailfish, found at 26,831 feet in the Mariana Trench.
Giant tube worms near hydrothermal vents can grow over 6 feet long and have no mouth, stomach, or eyes.
The Hadal zone, below 20,000 feet in ocean trenches, is home to unique species found nowhere else on Earth.
The barreleye fish has a completely transparent head that allows it to look straight up through its skull.
The sailfish can raise and lower a large dorsal fin to herd fish into tight groups before striking.
Ocean acidification caused by absorbed carbon dioxide is making it harder for shellfish and corals to build their calcium carbonate structures.
The fangtooth fish has the largest teeth of any fish relative to its body size and lives in some of the deepest parts of the ocean.
A new species of marine life is discovered roughly every two weeks.
The Pacific Ocean is shrinking by about an inch per year as the Atlantic Ocean slowly widens.
Manta rays have the largest brain-to-body ratio of any cold-blooded fish and can recognize themselves in mirrors.
The world's oceans contain an estimated 171,000 pieces of plastic per square mile of surface water.
The Dumbo octopus, named for its ear-like fins, lives at depths of up to 13,000 feet.
The ocean absorbs about 90% of the excess heat generated by global warming.
Corals are tiny animals called polyps that build massive reef structures by secreting calcium carbonate.
The Antarctic krill population weighs more than the total weight of all humans on Earth.
Deep-sea hydrothermal vents support entire ecosystems that thrive without sunlight, using chemosynthesis instead of photosynthesis.
The giant oarfish can grow up to 36 feet long and is believed to be the source of many sea serpent legends.
Phytoplankton in the ocean produce about half of the oxygen we breathe.
The ocean contains approximately 97% of all water on Earth.
Sound travels about 4.3 times faster in water than in air, allowing whale songs to carry for thousands of miles.
The vampire squid lives in the oxygen minimum zone of the deep ocean and can turn itself inside out to display bioluminescent tips.
Underwater rivers and lakes exist on the ocean floor, formed by dense brine that flows along the seabed.
The ocean's average depth is about 12,100 feet — deep enough to submerge most skyscrapers.
The giant Pacific octopus can squeeze through any opening larger than its beak, which is the only hard part of its body.
Sea turtles have existed for over 100 million years, surviving the mass extinction that killed the dinosaurs.
The ocean's twilight zone, between 660 and 3,300 feet deep, contains more fish by mass than all other ocean zones combined.
Bottlenose dolphins can remember the signature whistles of other dolphins they have not seen in over 20 years.
The Sargasso Sea is the only sea in the world without a land boundary — it is defined by ocean currents.
Whale sharks are the largest fish in the world, growing up to 40 feet long, but they eat only tiny plankton.
The blue dragon sea slug floats upside down on the ocean surface and stores the stinging cells of its prey for its own defense.