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A veined octopus sits inside a vacant bivalve shell, which it uses as a portable shelter, in the Philippines. This is one of the few examples—if not the only example—of tool use in invertebrates.
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Veined Octopus at Anilao Batangas Pier, Philippines

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Map showing the range of the eastern and western populations of Atlantic bluefin tuna and their spawning grounds in the Gulf of Mexico and the Mediterranean Sea.
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Atlantic Bluefin Tuna Distribution Map

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a fish heart is washed with solution in the lab
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A Beating Fish Heart

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two polychaete worms side by side
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Pettibone's Polychaete

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A side-view of a blenny fish with a back background.
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Blenny Fish - Haptoclinus dropi

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Snow petrels hunt in Antarctic sea ice, feeding on krill and fish.
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Snow Petrel

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The frogfish uses camouflage to hide from predators.
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Three-spot Frogfish

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A NASA satellite image from August 23, 2011 of Hurricane Irene, the Atlantic basin's first hurricane of 2011.
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Hurricane Irene

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: A thicket of Lophelia pertusa, a widespread deep sea coral, shelters a squat lobster.
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Coral Thicket with Lobster

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This is one of about 200 species of moray eels that live in tropical and subtropical coral reefs.
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Guineafowl Moray

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A bridge is flooded in Oklahoma after a hurricane
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Flooding Waters

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Screenshot from video about ocean acidification showing a pteropod animal.
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Ocean Acidification with Dr. Francisco Chavez

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