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CREDIT: Chris Kenaley The Mystery Develops Flash forward to 1956, when scientists described another new kind of fish. It was named the tapetail because of its long, streamer-like tail. It also had a large...
Giant squid live up to their name: the largest giant squid ever recorded by...
Did you know that 80 percent of the volcanic eruptions on Earth take place...
Now that the Census of Marine Life is over, we’re checking in with some of the...

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In this video Smithsonian research zoologist Dr. Martha Nizinski takes viewers with her as she searches for crustaceans in the deep sea . She's particularly interested in finding squat lobsters , which despite their name, are...
Watch as a team of wave chasers heads to Somoa where they search for an...
The deep-sea dragonfish ( Stomiidae ), also called the barbeled dragonfish,...

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It may be the last place you’d expect to find corals—up to 6,000 m (20,000 ft) below the ocean’s surface, where the water is...

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Dr. Carole Baldwin , a research zoologist and fish expert with the Smithsonian's National Museum of Natural History, gives viewers an inside-look at the Deep Reef Observation Project (DROP). She and...
What happens to deep-sea coral samples after they are collected? In this image gallery, see some of the ways ocean scientists sort, measure, photograph, and study them. Learn more in the multimedia...
This lanternfish ( Diaphus sp .), found in the Red Sea, has light-producing photophores along its ventral surface (belly), and a nasal light organ that acts like a headlight. Hear scientists tell...
Marine biologists discover a whalefish -- an incredibly rare deep-sea fish -- swimming in the ocean in this video. Because it is so dark where they live, females have well-developed sensory pores,...
Sunset? Time to glow! A biological clock triggers bioluminescence in the dinoflagellate Pyrocystis fusiformis . At dusk, cells produce the chemicals responsible for its light. Hear from marine...
Thousands of seamounts—most of them undersea volcanoes—tower above the muddy seafloor. They provide something hard to come by in the deep ocean : a solid surface to cling to. This photo gallery shows...
This fish belongs to a group of anglerfishes known as lophiiformes . This species, along with other anglerfishes, has a modified dorsal-fin spine, usually on the tip of the snout, which serves as a...
In the icy waters of the Arctic , a deep-water larvacean (aka “sea tadpole” because it looks like a tadpole) drifts through the water in its 'house.' This house is made of protein and creates almost...
The branches of a primnoid coral in the genus Calyptrophora provide a habitat for galathaoid crabs. Learn more about the deep-sea coral reefs in our Deep-sea Corals article .
GEOMAR scientist Armin Form works at his lab during a long-term experiment on the effects of lower pH, higher temperatures and "food stress" on the cold-water coral Lophelia pertusa . In a previous...
This deep sea creature, the whalefish ( Cetomimidae ), has a whale-like body, a gaping mouth, no fins or scales and a deep lateral line, which detects vibrations in the water. The first specimens...
A sea star , Hymenaster pellucidus , brought up from a benthic ROV dive. View the “Under Arctic Ice” photo essay to learn more.
This aptly named fish ( Anoplogaster cornuta ) has long, menacing fangs, but the adult fish is small, reaching only about 6 inches (17 cm) in length. It's teeth are the largest in the ocean in...
Ocean scientists recently discovered this new species of black coral off the coast of southern California. It was named the “Christmas tree” coral, Antipathes dendrochristos , in 2005 because of its...
An orange brisingid starfish sits on a large reef of Lophelia pertusa, cold-water corals in the Gulf of Mexico, at 450 m depth as a school of fish swims above. They have many arms—up to 20!—covered...
The Census of Marine Life - a ten-year effort by scientists from around the world to answer the age-old question, “What lives in the sea?” It was an international effort to asses the diversity,...
Blackdevil fish ( Melanocetus johnsonii ) are quintessential monsters from the deep . The female lurks in the dark, drawing in prey with her glowing lure, while the male attaches to her like a blood-...
Dive through the zones of the ocean to the deep ocean bottom, where many strange species live, and there are many yet to be discovered. Explore them in the Deep Ocean Exploration section.
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