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An underwater photo of coral recovering from a bleaching event.
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Resilient Coral

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Many medicines were based on a chemical from the sea sponge Tectitethya crypta.
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From Sea Sponge to HIV Medicine

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When it comes to many of our once-favorite seafoods, there aren't always plenty more fish in the sea. In fact, some studies estimate that up to 90 percent of large predatory fish have disappeared since humans began heavy fishing.
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Be a Picky Eater

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Great White Sharks breach to hunt -- with split-second timing they grab their prey in one swift snatch. Follow the whole breaching action in this slideshow.
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Breaching Great White Shark on the Hunt

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The research submersible Alvin uses bright lights to illuminate the dark seafloor.
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Human Occupied Vehicle (HOV) Alvin

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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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The deepest point on earth is the Mariana Trench.
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Mariana Trench

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Green turtles (Chelonia mydas) live in the warm coastal waters of tropical and subtropical oceans. Adults sometimes eat sponges, salps (floating jelly-like animals), and jellyfish, but they feed mostly on plants, like seagrass and algae. The pigment f
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Green Turtle

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X-ray image of a longnose butterflyfish
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X-Ray Image of a Longnose Butterflyfish

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X-ray image of a slender snipe eel
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X-Ray Image of a Slender Snipe Eel

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Jorge Velez-Juarbe, predoctoral fellow in the Department of Paleobiology at the Smithsonian's National Museum of Natural History
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Jorge Velez-Juarbe

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 Scientist Martha Nizinski holds a specimen of a fan sponge (Phakellia sp.) collected at a deep-sea coral study site off the coast of South Carolina.    
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Fan Sponge

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