A rapid spread of millions of sea urchins is threatening vital kelp forests, which remove pollutants from water.

The sea otter pup was tiny, probably less than 2 weeks old, alone in Morro Bay on an October morning earlier this year. A ...

With their pointy spines, sea urchins are not warm and fuzzy marine animals that people want to snuggle up to. While they are ...

Researchers warn this transition isn’t unique to the state. Expert sounds alarm as harmful species spread in US waterways: ...

These breeding grounds for fish are under siege from red turf algae, sea urchins, storm surges, warming waters and climate ...

While the marine heatwaves killing the kelp ecosystem were alarming on their own, the researchers have discovered a new ...

(The Conversation is an independent and nonprofit source of news, analysis and commentary from academic experts.) Rebecca Vega Thurber, University of California, Santa Barbara (THE CONVERSATION) ...

Nestled in the rocky, shallow areas of bays, tide pools, and kelp forests in Central and Northern California is a species of abalone which has been an important part of local life for centuries. Red ...

Heavier rains are triggering regulatory pauses on harvesting oysters and clams—and putting fishermen out of work.