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Sand dollars (like those pictured in this set of illustrations) are flattened, burrowing sea urchins. Dead, sunlight-bleached specimens resemble silver coins, hence their common name. These figures portray a sand dollar’s lifecycle from larva to adult.
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Sea Urchins

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A photo of a sea walnut, a ctenophore.
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Sea Walnut (Mnemiopsis leidyi)

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Thumbnail of a man looking to the right with flat water in the background.
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America's First Offshore Wind Farm

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Waves breaking on the shore
Overview

Currents, Waves, and Tides

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Looking through this iceberg's reflection in the Antarctic water, you can see the iceberg below the surface—some 90% of its total volume.
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The Arctic and The Antarctic

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A variety of organisms make their home on this tropical coral reef in Indonesia.
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Live from the Field: Bali, Indonesia

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two predatory fish attack birds
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Xiphactinus

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A mangrove forest at dusk
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Mangrove Forest

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The Moses sole blends in with the bottom of the seafloor and releases a natural shark repellant when threatened.
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Moses Sole

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a man sits pondering with a tan ball cap on
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Captain Stelly

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a whale skeleton on the sea floor with octopuses on it
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Whale Fall Feast

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