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A bright red sea anemone clings to rocks underwater.
Slideshow

Blue on the Big Screen

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Illustration of The Little Mermaid, mid-19th century.
Photo

The Little Mermaid

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Crocheted corals from the Smithsonian Community Reef group on Flickr.
Photo

Hyperbolic Crochet Coral Forms

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Two nurse sharks hover over a baited cage
Lesson Plan

What is a Coral Reef? Elementary School

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One of several rowboats that were sunk in front of Lake Hotel at Wyoming's Yellowstone National Park in the early 20th century.
Article

Underwater Parks in 3-D

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A painting of a working vessel moored at a dock.
Photo

Chesapeake Boat Painting

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The Plastiki sailing vessel on the water with sails unfurled, in front of a large suspension bridge.
Photo

The Plastiki Sailboat

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An underwater photo of a diver with a camera shooting video of a whale.
Photo

Whale on Camera

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A Gulf Coast resident sits on his boat, smiling for the camera.
Photo

Smiling Gulf Coast Man

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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.
Photo

Zooplankton in the Eye of a Needle

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Seabirds on a rocky outcrop.
Photo

A Gathering of Seabirds and Seals

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Beating Cilia of Comb Jelly Combs
Photo

Sea Gooseberry Larva

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