More than 200 whales are stranded off the coast of Tasmania, Australia.
Half of the animals that washed ashore in Macquarie Harbor are still alive.
In the same place two years ago, the most massive stranding of whales in the history of Australia was recorded.
It is not yet known what caused it, but rescue teams have gone into action. Just the other day, 14 dead whales were found on King Island in Tasmania's Bass Strait.
The 230 whales found on Wednesday are believed to be pilot whales.
These extremely sociable mammals are known for mass beaching, as they swim in large, close-knit groups that rely on constant communication.
Experts are making a rescue plan but the operation will be "complicated" because of the location, Tasmania's Department of Environmental Protection said. Macquarie Harbor is a wide, shallow bay on the state's rural west coast.
A major rescue operation was also launched in September 2020, when almost 500 oil rigs collapsed in the same port. More than 380 animals died and about 100 survived thanks to rescuers.
The similarities between that case and Wednesday's, such as the same species, location and time of year, are "unusual" and worrying, wildlife researcher Vanessa Parota told the BBC.
It's possible the whales were "wrong" because they were following a sick or disoriented leader, or suddenly ended up in shallow water, she adds.
Climate change can have an impact – changes in the environment, water temperature or changes in prey movements can disrupt them. But the reasons why stray whales remain a "mystery" and why there have been so many cases in Tasmania, says Parota.