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A blue cod and sea pens, a unique type of cnidarian, speckle the seafloor in New Zealand's Fiordland region.
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Blue Cod Amongst Sea Pens

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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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A photo of Oceana's ice class research vessel, the Hanse Explorer, on the Baltic Sea.
Slideshow

Biodiversity in the Baltic Sea

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The whitish spots on this fish are individual parasitic trematode worms.
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Parasitic Worms in a Fish

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Colorful fishes throng a reef in the Northwestern Hawaiian Islands.
Slideshow

Bizarre and Beautiful Coral Reef Animals

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A glowing ocean surface.
Article

Six Ways to See Ocean Ocean Bioluminescence

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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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A tusk shell hermit crab peeks out of his shell.
Article

Uncovering Biodiversity Before It Disappears

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This shrimp is colored to fit in - probably why they are common members of the seaweed community.
Slideshow

A World Adrift: Life in the Sargassum Slideshow

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Illustrations of fish and crab from New Guinea
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New Guinea Fish and Crab

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A sea toad from the deep waters off of Curacao.
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Collections from Curaçao

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A polar bear and its cub in Arctic National Wildlife Refuge, Alaska.
Slideshow

Celebrating Marine Moms

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