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Polar bears have evolved to survive in the Arctic.
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Polar Bear on the Ice

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The Cocos Island National Park site in Costa Rica was inscribed on the World Heritage List in 1997. Cocos Island's position as the first point of contact with the northern equatorial counter-current and the myriad interactions between the island and the su
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Cocos Island National Park, Costa Rica

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Zooplankton are small—but do you know just how small? This drop of water smaller than the eye of a needle is magnified 20x and contains multitudes.
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Zooplankton in the Eye of a Needle

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A few corals are part of this small sampling of the approximately 35 million specimens represented in the invertebrate zoology collection housed at the National Museum of Natural History.
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Specimens from the Smithsonian Invertebrate Zoology Collection

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Photo of a Hawaiian monk seal on the beach, with the ocean in the background.
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The Endangered Hawaiian Monk Seal

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a pile of pink walruses
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Walrus Haulout

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A black and white diagram of a tunicate larvae.
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Tunicate Larvae

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Thalassinidean shrimp (Thalassinidea) build complex burrows deep in the mud.
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Thalassinidean Shrimp

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Monk seal pup
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A Mediterranean Monk Seal Pup

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Photograph of a bristly brown and white worm, with one end pressed against a pale green coral.
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Fireworm Takes on Fire Coral

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The rich colors of emperor angelfish make them a vibrant version of royalty.
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Emperor Angelfish

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an octopus with rainbow colored webbing between its arms
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Violet Blanket Octopus

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