The Pacific gray whale population received a significant and much-needed boost this season, which is evident by the remarkable number of calves passing California on their first-ever journey to Arctic home waters.

Environmental laws are having a positive effect on reducing levels of contaminant metals in Californian coastal waters

An invasion of salp has prompted Pacific Gas and Electric Co. to temporarily shut down a nuclear reactor at Diablo Canyon, on the central California coast.

420 Divers Participate in 31st Annual Underwater Cleanup

Humboldt Squid found to spend many hours in a band of oxygen-poor water at a depth of more than 500 m in the California current.

New marine protected areas (MPAs) went into effect Jan. 1, 2012 from Point Conception in Santa Barbara County to the U.S./Mexico border.

An octopus at the Fitzgerald Marine Reserve in California hauls itself out of the water, and moves across land, before sliding back into the water. Octopuses do this in nature to escape predators, and also to find food of their own in tidal pools.

Great white numbers increasing off California coast, shark expert proclaims

California marine scientist in Santa Barbara says the new species of sea slug he discovered was practically in his marine "back yard."

For the third time in four years, the Monterey Bay Aquarium has released a great white shark back into the ocean after a successful stay in captivity.