Just by eating sea urchins and destructive shellfish, sea otters are keeping kelp forests healthy and coastal erosion at bay.

Petition to delist southern sea otters filed by sea urchin harvesters. In their March 2021 petition to delist the southern sea otter from the federal Endangered Species Act, the California Sea ...

A sea otter relocation plan could involve moving pups from the Monterey Bay Aquarium and dropping them off in parts of the San Francisco Bay. Not everyone thinks that's a good idea.

Purple sea urchins, beware: There’s a purple urchin-eating predator on the horizon — and its name is the sunflower sea star.

Sea otters were hunted to local extinction more than 100 years ago. Their absence left a hole in Oregon Coast ecosystems that's being felt now more than ever.

This tagged sea otter, called 841 by authorities, has been harassing surfers along the Santa Cruz coastline, but so far, she has dodged repeated attempts to trap her.

These urchin-eating sea stars might be helping us reduce carbon levels. The 24-armed sunflower sea star is not a picky eater, which may makes it crucial to restoring kelp forests.

Item 1 of 5 A sea otter stands as another sea otter emerges from water, at the Aquarium of the Pacific, in Long Beach, California, U.S., April 11, 2024. REUTERS/Mario Anzuoni ...

The orphaned sea otter who became a foster mother to 15 pups. By Malia Wollan No one knows how Rosa was orphaned in September 1999, in Santa Cruz County, Calif. She was nameless then, just 4 weeks ...