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Chrysaora melanaster is a jellyfish found in the Arctic.
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Jellyfish and Comb Jellies

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On Moorea, an island in French Polynesia, researchers are striving to complete a biocode—a DNA catalog of every life form big enough to pick up with tweezers.
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Scientists Catalog Life on the Island of Moorea

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Two octopuses sitting underwater highlight the different textures the animals can take on.
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Octopuses and Squids

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A shell placed in seawater with increased acidity slowly dissolves over 45 days.
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Ocean Acidification

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A photo of a squid using bioluminescence to hide in the deep sea.
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Bioluminescence

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The sea star Odontaster validus and sea urchin Sterechinus neumayeri are often found living in association with one another along the Antarctic coastline, here during the Census of Marine Life.
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Sea Stars, Urchins, and Relatives

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Corals, sponges, and algae are the major components of most coral reef communities as shown in this picture.
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Corals and Coral Reefs

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Japanese scientists videotaped this female giant squid, alive, at the water's surface
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Giant Squid

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