HOBART, Australia (AP) More pilot whales were found stranded in Australia on Wednesday, raising the estimated total to nearly 500, including 380 that have died, in the largest mass stranding ever recorded in the country.

Authorities had already been working to rescue survivors among an estimated 270 whales found Monday on a beach and two sand bars near the remote coastal town of Strahan on the southern island state of Tasmania.

Another 200 stranded whales were spotted from a helicopter on Wednesday less than 10 kilometers (6 miles) to the south, Tasmania Parks and Wildlife Service Manager Nic Deka said.

All 200 had been confirmed dead by late afternoon.