Almost 90 long-finned pilot whales and bottlenose dolphins died after washing up last week at Hamelin Bay, on the country's west coast.
It was the second mass stranding in March, and took the total number of cetaceans to beach in southern Australia in the past four months beyond 500, including a single stranding of almost 200 on King Island.
Researchers tracking the beaching of whales in the region since 1920 said strandings tended to occur in 12-year cycles which coincided with cooler, nutrient-rich ocean currents moving from the south and swelling fish stocks."
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