An aerial and UW look at a large aggregation of Leopard Sharks off Marine Room in La Jolla, CA. Sept 15, 2016
Hundreds of dead leopard sharks have been spotted at the shorelines of Oakland, Berkeley, Hayward, Foster City, Redwood City, Alameda and San Francisco (Photo : rogeruzun/ YouTube)

Marine biologists are baffled by the huge numbers of dead leopard sharks being washed ashore San Francisco Bay, from San Mateo to Bolinas.

Since the second week of March, hundreds of dead leopard sharks have been spotted at the shorelines of Oakland, Berkeley, Hayward, Foster City, Redwood City, Alameda and San Francisco. The huge die-off of the stripped fish is considered to be largest leopard shark mortality event since 2011.

“My estimate is that several hundred sharks have already died,” said Mark Okihiro, the senior fish pathologist for the California Department of Fish and Wildlife, as per SF Gate. “There appears to be no leveling off of shark deaths in the bay….