Killing the protected animals may be the only way to stop them from eating too many of the Pacific Northwest’s endangered salmon.

A common neurotoxin produced by algae blooms is making California sea lions more aggressive. Here’s why it has the power to change behavior—and the danger it poses. Rescuers capture a sick sea lion in ...

A crowd of children gripped the fence barricading them from a large pool of saltwater before a backdrop of small coastal houses, shuffling to get a glimpse of the open doorway from which the act of ...

After the longest toxic algal bloom on record off the southern California coast, marine mammal researchers are investigating how sea lions were affected, and releasing the last few back into the wild.

Sea lions and other ocean mammals in Southern California are falling victim to a poisoning event that a local expert calls the worst in recent memory. It is stranding the mammals along the coast as ...

An outbreak of kidney disease among sea lions could result in humans and pets getting ill. The Marine Mammal Center in Sausalito has responded to more than 200 sea lions that have shown symptoms, with ...

LOS ANGELES — Sea lions and other ocean mammals in Southern California are falling victim to a poisoning event that a local expert calls the worst in recent memory. It is stranding the mammals along ...