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A Pontoh pygmy seahorse
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How Many Seahorse Species?

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Salps are tube-shaped, soft, transparent animals that swim through the ocean, straining out plant food as they go.
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Antarctic Salps

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Many medicines were based on a chemical from the sea sponge Tectitethya crypta.
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From Sea Sponge to HIV Medicine

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A Cirraturlid worm swims in the open ocean.
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Why I Love Polychaetes

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a yellow and brown sea cucumber on a black background
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Sea Cucumber Close-up

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a star shaped fossil blastoid
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Blastoid Fossil

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a colorful octopus in blackwater
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A Dazzling Ocotopus

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a colorful crustacean with hints of purple in its shell and green in its belly
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Antarctic Krill

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a fifty-five gallon aquarium
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Fifty-five gallon Tank

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This beautiful turquoise and purple creature is an aeolid nudibranch. The aeolid nudibranch is covered by branches that are actually gills, called cerata. The cerata also contain parts of the nudibranchs digestive system.
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Red-lined Nudibranch

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Bright colors seem to jump off of this comb jelly, or ctenophore.
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Floating Antarctic Comb Jelly

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An isopod stands on top of a glass sponge, extending its legs to find zooplankton.
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Isopod in a Glass Home

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