No fewer than 100 pilot whales became stranded off the coast of Western Australia on Thursday, local authorities said.

Western Australia’s parks and wildlife authority, DBCA, said the whales became stranded in shallow waters near the small town of Dunsborough, some 250 kilometres south of Perth.

Numerous animal rights activists and residents rushed to the beach to douse the animals with water to keep them alive.

However, local authorities urged the public to approach the whales only under the guidance of experts.

“We know people want to help but we asked that people do not attempt to rescue the animals without direction of DBCA staff as this may cause further injury. It will bring distress to the animals and hinder a coordinated rescue effort.

“The highest priority at mass whale stranding events is always human safety followed by animal welfare. We want all staff and volunteers to go home safe,’’ the authority said in a statement.

Marine expert Ian Wiese, who was at the scene, told Radio ABC Perth that several whales had already died.

“The others are just thrashing around and we’ll have many deaths in the next few hours. It’s terrible, there’s lots of theories around the world but nobody’s really been able to find a cause for mass whale stranding,’’ Mr Wiese said.

The largest mass stranding in Australia was in the same area in 1996 when 320 long-finned pilot whales were beached.

Almost all the animals survived.

In 2018, 100 pilot whales died in Hamelin Bay in Western Australia after another mass stranding.

In 2023, almost 100 pilot whales became stranded on Cheynes Beach east of the city of Albany in the south of the state.

Despite the best efforts of emergency services and volunteers, none of the animals survived.

Pilot whales form extremely close bonds with each other. At certain times of the year, they travel in large pods, which increases the risk of mass stranding. 

(dpa/NAN)