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Illustration of colorful nudibranchs from Ernst Haeckel.
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Nudibranchs

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Dr. Clyde Roper in a one-person submersible.
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One-Person Submersible

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Close-up photograph of an arrow squid embryo.
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Squid Embryo

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A red deep-sea fish specimen.
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A Fish that Looks Like a Whale

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This is one of about 200 species of moray eels that live in tropical and subtropical coral reefs.
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The Revealing Nature of Eel Faces

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Sea bass flock to a tropical coral reef in the Red Sea.
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5 Simple Things You Can Do for the Ocean

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A thresher shark uses its unusual tail fin for swimming and hunting.
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The Thrashing Thresher Shark

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

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Photo of a sperm whale just below the water's surface.
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Sperm Whale, Dominica

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Steller's sea eagles, a threatened species, gather on sea ice at the Shiretoko Peninsula in Japan.
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Shiretoko, Japan

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map of the 13 marine protected areas in the United States, that comprise the National Marine Sanctuary system
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Marine Sanctuary Map

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Two nurse sharks hover over a baited cage
Lesson Plan

Coral Adaptations Inquiry Lab

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