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Polar bears are threatened by a lack of sea ice.
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Polar Bears on "Thin" Ice

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a colorful sea urchin with red and white striped spikes
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Dazzling New Sea Urchin Species

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A piece of the Institute For Figuring’s Hyperbolic Crochet Coral Reef known as the Ladies Silurian Atoll.
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Ladies Silurian Atoll from the Hyperbolic Crochet Coral Reef

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Isaac Ginis, hurricane modeling expert from The University of Rhode Island
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Dr. Isaac Ginis

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Dr. Stephen Cairns, a Smithsonian research zoologist, studies deep-water corals.
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Dr. Stephen Cairns

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A emperor penguin chick sits under its mother's legs.
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Emperor Penguin Chick with Mother

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Home is where the hull is: Since the dawn of seafaring, humankind has had to deal with pesky creatures, such as barnacles, that “foul” ship hulls and boat propellers like this one.
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Boat Propeller Fouled With Barnacles

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A landscape photo of a shoreline with tall grass-like plants lining the water's edge.
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Phragmites australis

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A yellow remotely operated underwater vehicle, or ROV, at the surface of the water.
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An ROV Explores the Baltic Sea

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Dr. J. Murray Roberts photographed these living polyps from the Mingulay Reef Complex off Scotland in aquaria in 2010.
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Lophelia Pertusa Coral Polyps

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Lights attached to this deep-sea camera system enable scientists to capture detailed images of deep-sea corals in otherwise dark water.
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Deep-Sea Camera

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The Hawaii Undersea Research Laboratory’s Pisces V submersible is lowered for a dive to study deep-sea corals.
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Submersible Launch

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