Rescuers are trying to save 17 whales that were washed up on a beach in south-west Australia.
Around 80 whales and bottlenose dolphins became stranded on the beach on Monday, but sadly many of them have already died.
The creatures were being battered by rough waves, and experts are planning to move them to a calmer bay.
They want to release the whales back into the sea, to give them the greatest chance of survival.
Western Australia's Conservation Department said the whales and dolphins were washed up along a stretch of beach about four miles long, early on Monday.
Rescuers are trying to save the surviving whales
At first it was thought the whales were false killer whales, but when experts looked at them more closely they discovered they were long-finned pilot whales.
It's not unusual for whales to become stranded on beaches in the area as they travel to and from Antarctic waters, but scientists don't know why it happens.
It is unusual for whales and dolphins to become beached together.