As ocean water becomes more acidic, corals and shellfish must spend more energy to make their calcium carbonate shells.

A Swim Through the Ocean’s Future

Can a remote, geologically weird island in the South Pacific forecast the fate of coral reefs?

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Picture of the Week—Project Pebble

The University of Cambridge Department of Engineering hosted a photography contest earlier this year, and the winners have just been announced

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Seas of Plastic

The Kuroshio, or "Black Current," is the Pacific Ocean's answer to the Atlantic's Gulf Stream.

Borne on a Black Current

For thousands of years, the Pacific Ocean’s strong currents have swept shipwrecked Japanese sailors onto American shores

Unknown in the Americas 30 years ago, lionfish have multiplied at a rate that is almost unheard of in marine history.

Invasion of the Lionfish

Voracious, venomous lionfish are the first exotic species to invade coral reefs. Now divers, fishermen—and cooks—are fighting back

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Underwater Volcano Erupts Near Tonga

A team from the National Oceanic and Atmospheric Administration caught the first ever video recording of an underwater volcano erupting.

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