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The giant pacific octopus can grow up to 600 pounds!
Photo

Revealing the Largest Octopus

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A cuttlefish eye
Photo

Dazzling Eyes

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Chrysaora melanaster is a jellyfish found in the Arctic.
Overview

Jellyfish and Comb Jellies

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Jellyfish are transparent and made up of 95 percent water, so you’d think there isn’t much to them. But you’d be wrong. Jellyfish are more complex than you’d think—and one of their most fascinating parts is their stinging cells.
Video

How Do Jellyfish Sting?

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Find out how you get two Giant Squid the size of a school bus from a fishing boat in Spain to a museum Washington, DC.
Audio

Giant Squid: One Species at a Time

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A photo of Oceana's ice class research vessel, the Hanse Explorer, on the Baltic Sea.
Slideshow

Biodiversity in the Baltic Sea

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A translucent hyperiid on a black background with orange stripes along its head.
Article

Many Eyes, Many Perspectives: The Astonishing Visual Systems of Hyperiids

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

Aeolid Nudibranch Defense

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Two nurse sharks hover over a baited cage
Lesson Plan

Just Jelly: ecological role of gelatinous zooplankton

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A glowing ocean surface.
Article

Six Ways to See Ocean Ocean Bioluminescence

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A brachiopod looks like a clam, but they aren't closely related.
Photo

A Modern Day Brachiopod

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A screenshot of some of Smithsonian's marine story windows in Google Earth
Article

What Lives in the Gulf of Mexico? Exploring Marine Collections on Google Earth

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