SAN FRANCISCO — Marine experts say a dead gray whale found in the San Francisco Bay appears to have died from blunt-force trauma from a ship.

It's the third gray whale found dead in the San Francisco Bay since March, when a gray whale that died of malnutrition was found on Angel Island. Another died last month after an orca attacked it and it then got entangled in fishers' nets.

The Marine Mammal Center in Sausalito says a team of 11 scientists found significant bruising and hemorrhaging to the whale's blubber and muscle tissue and several skull fractures.

It says the team on Wednesday performed a necropsy on the 44-foot adult female gray whale.

Gray whales are making their annual northward migration from Mexico to Alaska.