Oceans

Gray whales in a small group that sticks close to the shores of the Pacific Northwest appear to be shrinking—and shockingly quickly

Massive blobs of sargassum seaweed are taking over Caribbean beaches. The seaweed explosion is fueled by pollution washing into the ocean from rivers in the Americas and Africa

Researchers are investigating how an iron infusion from glacial meltwater might change Antarctica’s seas and the climate.

Warming waters are reaching several miles into Antarctica’s Thwaites Glacier—nicknamed the “doomsday glacier” because of its potential impact on sea-level rise

A stunning photography collection underlines how climate change is altering the world’s coastal and lakeside environments

Ancestors of so-called soft corals may have developed bioluminescence in the earliest days of deep-ocean living

“A mass bleaching event is, by definition, a mass mortality event,” a leading coral reef expert says

A person-centric scientific conference demonstrates that gathering can counter the isolation of underrepresentation

One in seven species of deepwater sharks and rays is threatened with extinction because of the liver oil and meat trade and emerging fishing technologies that make it possible to catch deep-sea fishes

A marine heat wave last year undercut efforts to regrow coral reefs off Florida’s coast. Conservationists are worried this year could be problematic, too

Federal scientists want to study the benefits and risks of using ocean ecosystems to absorb more climate pollution from the sky

Coral reefs hundreds of feet below the ocean surface aren’t as safe as scientists thought