“What happens is they sit and wait for the pipi shells to come up,” he said.

“When the tide is at a particular point, the pipi shells emerge.”

Mr Bero said it’s not an unusual occurrence.

“You’ll see them gather at one particular spot and they’ll just sit there and wait,” he said.

“From about September onwards, they sit up right along the beach.

“There are sardines in the water but they weren’t really chasing the fish.

“With the sardines, the kids run in and catch them by hand.”

At the end of the video, Mr Bero is heard saying it was time for him to go fishing.

He said he and a family member caught five trevally between them but the sharks were off limits.

“We’ve always respected them and they clean up rubbish such as dead fish,” he said.

“Also, sharks are totems for families on the Murray Islands.

“We have respect for everything around us, it’s all there for our appreciation and not to destroy or over-fish or do any harm.

“It’s our job as custodians to look after our environment and all the animals.”

Mer Island is one of three in the Murray Island group.