Beachgoers have been caught on camera fleeing in terror after mistaking a pod of beached whales for a shoreline shark attack.
The video, filmed at Prainha beach in in Arraial do Cabo, Brazil, shows a number of people on the beach fleeing and screaming in terror as they see dorsal fins and huge tails trashing around in the water.
The water turns dark as the sea creatures churn up the sand on the sea floor.