Authorities have been working to rescue survivors among an estimated 270 whales found on Monday on a beach and two sand bars near the remote west coast town of Strahan.
Another 200 stranded whales were spotted from the air on Wednesday less than 10 kilometers (6 miles) to the south, Tasmania Parks and Wildlife Service Manager Nic Deka said.
“From the air, they didn’t look to be in a condition that would warrant rescue,” Deka said. “Most of them appeared to be dead.”
Further assessment of their condition would be made by boat and crews would be sent if the whales could be saved, he said.
About 30 whales in the original stranding were moved from the sandbars to open ocean but several got stranded again, Deka said.
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About a third of the first group had died by Monday evening, and an update on the death toll and condition of survivors was expected later Wednesday.
“In Tasmania, this is the biggest (mass stranding) we’ve recorded,” Marine Conservation Program wildlife biologist Kris Carlyon said.
Rescue crews remained optimistic about freeing more whales, Carlyon said.
With cool weather helping, “We’ve got a very good chance of getting more off that sandbar,” he added.
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