The short-finned pilot whales were spotted washed up on Hamelin Bay, south of Perth, by a commercial fisherman.
Department of Biodiversity, Conservation and Attractions incident controller Jeremy Chick said the safety of the surviving whales was the priority. There's a risk the carcasses will attract sharks and this has caused the authorities to issue warnings against swimming in the area, The Guardian reports.
"We're obviously managing the animals and the palliative care of those animals, and the rescue of the animals that are still alive, if possible", Mr Tannock said.
For instance, a series of unusual G. macrorhynchus stranding events coincided with a large-scale military exercise around Taiwan in 2004, the IUCN said. "I've never seen anything like it, so many whales beached like this", tourist Barrie Brickle said. Blue whale is considered the biggest one among them and the smallest is the dwarf sperm whale. The whales are believed to be the short-finned ones among which a majority has already perished.
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The carcasses are being removed and authorities are taking DNA samples in a bid to understand why the whales beached.
In 2009, more than 80 whales and dolphins died on a beach in Hamelin Bay.
"They inhabit tropical and subtropical waters and may be seen in the hundreds but groups usually number less than 100", the parks service said.
Rebecca Wellard, a whale researcher at Curtin University in Sydney, says that mass strandings nearly invariably involve oceanic species of cetaceans - whales, dolphins and porpoises - and that long-finned and short-finned pilot whales tend to be the most frequent casualties. "There is simply not enough information known about their remaining wild populations", Captain Paul Watson, the founder of Sea Shepherd Conservation Society said in 2015 after a pilot whale by hunters in Taiji's infamous cove.