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Two nautiluses in the open ocean off the coast of Palau.
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A Couple of Nautiluses

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Close-up photograph of translucent coral polyps, showing the symbiotic algae living inside.
Slideshow

Zooxanthellae and Coral Bleaching

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A couple inches wide and up to ten feet long, the bobbit worm stays hidden under tropical sands with just its five antennae poking out—waiting for prey to swim by.
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The Bobbit Worm

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A photo of a squid using bioluminescence to hide in the deep sea.
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Midwater Squid, Abralia veranyi

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 Scientist Martha Nizinski holds a specimen of a fan sponge (Phakellia sp.) collected at a deep-sea coral study site off the coast of South Carolina.    
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Fan Sponge

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This close-up view of salps, which have aggregated together into a long chain, have brilliant red guts from eating red plankton.
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Close-up View of Salps

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“The largest land migration of any animal on Earth, as many as 120 million crabs carpet the island in red as they move from the rain forest to the coast.” -- Nature's Best photographer, Stephen Belcher.Equipment Used to Capture the Shot: Canon EOS-1D
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Red Crab Migration, Christmas Island, Indian Ocean

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Smithsonian Zoologist Dr. Clyde Roper in front of the museum's stored cephalopod collection.
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Smithsonian Cephalopod Collection

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A red and white colored bristle worm swims in the water column.
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A Striped Deep Sea Worm

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Squid expert Dr. Clyde Roper examines specimens stored in jars in the Smithsonian collection.
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Dr. Clyde Roper

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This species of bamboo coral, discovered in 2004 in the Pacific Northwest, has unusually long and impressive tentacles.
Slideshow

Newly Discovered Deep-Sea Corals

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a small spikey crab sits on a black background
Article

Tiny Crab Gains a Big Audience

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