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Many medicines were based on a chemical from the sea sponge Tectitethya crypta.
Article

Five Questions for Shirley Pomponi, Medical Sponge Hunter

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

Little Sea Star

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The sea star Odontaster validus and sea urchin Sterechinus neumayeri are often found living in association with one another along the Antarctic coastline, here during the Census of Marine Life.
Overview

Sea Stars, Urchins, and Relatives

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Two of the worlds largest jellyfish, the lions mane jellyfish, float together.
Photo

Extreme Jellyfish

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A nudibranch showing a closeup of their fleshy, tentacle-like growths, called cerata.
Article

How Sea Slugs Steal the Defenses of Their Prey

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A sea toad from the deep waters off of Curacao.
Slideshow

Collections from Curaçao

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This day octopus (Octopus cyanea) has shaped itself like seagrass or some coral so hide from predators or stalk prey.
Photo

Camouflaged Octopus Blends In

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A tan sea urchin from the deep seas of Curacao.
Photo

Tan Sea Urchin

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Hermit crabs, like this one collected in Moorea, usually protect their soft, vulnerable abdomens from predators by reusing empty snail shells. This specimen shows the crab without its customary borrowed shelter.
Photo

Hermit Crab Without a Shell

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Overfishing is leading to an abundance of less desirable species like jellyfish.
Article

Peanut Butter and Jellyfish

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a squid
Article

Meet the Only Squid that Willfully Lops off its Arms

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A blue-ringed octopus
Article

How Octopuses and Squids Change Color

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