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Big Red Deep Sea Jellyfish
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Big Red Jellyfish

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This fish is using counterillumination to disappear. At left it stands out against the light above it. At right, with bioluminescent structures lit, it blends in.
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Fish Using Counterillumination

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A white coral (Corallium sp.) and two vase sponges (left) grow on an Atlantic Ocean seamount.
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Balanus Seamount

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One of the smallest shearwaters in the Atlantic, Audubon's Shearwater (Puffinus lherminieri) is about the size of an American Robin.
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Audubon's Shearwater

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Two researchers, looking for fossil whales, scan a rock formation in Peru's Pisco Basin.
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Searching for Fossil Whales in Peru

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A robotic arm on the Johnson-Sea-Link submersible retrieves Galatheid crabs for research. In the background is a species of the deep-sea coral Lophelia.
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Collecting Deep-Sea Crabs

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Divers deep into the cold waters beneath the ice.
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Diving Beneath the Ice

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Pacific cephalopods illustrate the wide diversity among this group of mollusks.
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Squids and Cephalopod Diversity

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The squidworm has 10 tentacle-like appendages on its head.
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The Squidworm - A New Species

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This small sea star, little more than an inch across, is orange on top and whitish underneath.
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Little Sea Star

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A large ship flushes water from its ballast tanks while at sea
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Ship Flushing Ballast Water at Sea

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Scientist Martha Nizinski examines a sample of the deep-sea coral Lophelia pertusa, collected 600-m (1,969-ft) deep off the coast of the southeastern United States.
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Deep-Sea Coral Sample

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