A mysterious mound of wiggling creatures have left people perplexed after washing up on a beach.
The clam-like creatures washed up on Greenhills Beach in Sydney, Australia, have been compared to a scene from the sci-fi series Stranger Things.
Locals have said they've never seen anything like them before.
Vicki Hansen told Yahoo News Australia she was walking her dog on Saturday morning when she spotted the fascinating creatures.
"I saw many that were hanging limply but as I bent down to study them I saw that some of them were moving, almost like a slow dance," the videographer said.
"I figured that the limp ones had probably died from being removed from the sea, and that the ones that were moving were probably doing their last ‘death dance’.
"It was quite surreal, strange and beautiful at the same time."
The creatures are thought to be lepas, which mainly live in areas of the sea away from land.
Several other passersby spotted the creatures and posted photos of them online in a bid to determine what they are.
One woman, who said she also saw them as she walked along the beach, described them as 'gross, majestic and weird' all at the same time.
She hoped the tide would take them back out to sea.
But a day later, Vicki said she passed by them again and said the creatures looked as though they had died.
She said they were limp and there was no movement.
