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A harp seal in icy water
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Harp Seal

Harp seals depend on seasonal ice during the breeding season. Their populations may...
A fur seal in kelp
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Fur Seal

 Warming climate, changing ocean chemistry, and overfishing threaten kelp forests...
A school of Atlantic bluefin tuna
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Atlantic Bluefin Tuna

 Endangered Atlantic bluefin tuna are caught in the wild and fattened in pens for...
A translucent pteropod swims freely in the open ocean with a black background.
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Shelled Pteropod

 Changes in ocean chemistry destroy the shelled pteropods that this “naked sea...
Phoenix Islands protected area
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Phoenix Islands

 Unlike most coral reefs, those of the Phoenix Islands are protected from pollution...
Photograph of a transparent polka-dotted squid in the dark ocean.
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Cockatoo Squid

 This transparent cockatoo squid (Leachia sp.), also known as a glass squid, lives...
A fringe of tentacles surrounds the bell of this jellyfish (Halicreas minimum).
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Midwater Jellyfish

 A fringe of short tentacles surrounds the flattened bell of this tiny, transparent...
This copepod (Gaussia princeps) was collected deeper than 1000 meters in the Sargasso Sea by Census of Marine Zooplankton (CMarZ) researchers in April 2006.
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Deep Sea Copepod

 This copepod (Gaussia princeps) was collected deeper than 1000 meters in the...