Volunteers from the Marine Mammal Center release California sea lions Quly (L) and Togozees (R) back to their ocean home at Rodeo Beach in Marin County, California, on August 4, 2023.

MONTEREY, Calif. — The Marine Mammal Center says that for years, data on marine mammal harassment cases have been underreported until now. The center says that they've rescued more than 160 ...

Currently, the Marine Mammal Care Center is the only organization approved by the National Oceanic and Atmospheric Administration to rescue and rehabilitate marine mammals in Los Angeles County.

Dolphins are the best-studied marine mammals capable of this style of sleeping. Brain scans on captive dolphins show that while one hemisphere is in slow-wave, deep sleep, the other hemisphere is ...

This image provided by Channel Islands Marine and Wildlife Institute, shows dead and injured marine mammals ashore on a beach in Santa Barbara County, Calif., on Tuesday, June 20th, 2023. / AP ...

Lethal algae bloom is over, but sickened marine mammals aren’t safe yet An aerial view of surfers waiting for a set at Dog Beach in Huntington Beach.

H5N1, an avian flu virus, has killed tens of thousands of marine mammals, and infiltrated American livestock for the first time. Scientists are working quickly to assess how it is evolving and how ...