May 30 (UPI) -- Six gray whales have been found dead in the wider San Francisco Bay Area in the last seven days, raising the total number of dead whales in the region to 15 for the year.

According to a joint Wednesday statement from the California Academy of Sciences and The Marine Mammal Center, the most recent gray whale was found on Wednesday. The carcass was found near Alamere Falls at Point Reyes National Seashore, they said.

Two whales were discovered on Monday, one near Alcatraz and the other near Point Bonita. A whale was discovered near Berkeley on Saturday, one near Fisherman's Bay on May 22 and one near Bolinas on May 21.

Of the six whales, only the one found near Bolinas -- a yearling -- received a partial necropsy, the results of which were inconclusive, the organizations said.

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