LONG BEACH, Calif. — A ship's anchor may have hooked, dragged and torn an underwater pipeline that spilled tens of thousands of gallons of crude oil into the ocean off Southern California, according to federal investigators who also found the pipeline owner didn't quickly shut down operations after a safety system alerted to a possible spill.

The California oil pipeline spill could endanger sea life for years, experts say. Help us save the marine ecosystem, fisheries, our California beaches and shoreline.