SeaWorld San Diego's rescue team released this California sea lion back into the Pacific Ocean after rehabilitation. Video: ...

Someone cut off the head of a sea lion in Northern California and rode off with it in a bag. Authorities are now offering $20 ...

The National Oceanic and Atmospheric Administration’s Office of Law Enforcement said a witness reported seeing a person ...

After a Doran Regional Park staff member discovered a beheaded sea lion, authorities are now investigating the incident.

A man was located and arrested after he allegedly beat a pregnant seal lion with a stick. A pregnant sea lion is recovering ...

NOAA officials are looking for a suspect seen using a black 8-inch knife to remove the deceased sea lion's head.

"Lifeguards determined that a free diver had been bitten by a marine mammal (sea lion or harbor seal)," the department says.

Wildlife officials are warning the public of a toxic algae bloom affecting marine mammals along Los Angeles County beaches.

TACOMA, Wash. — A baby sea lion toting an artificial kelp strip was filmed performing intricate rhythmic gymnastics-esque circles through the waters of an aquarium in Washington state.

Who knew that a sea lion could be so graceful? One zoo shared a video of one of their residents putting on a majestic underwater performance.