“Hazza! There’s sharks there! Come back!” screams one of his friends in a video of the bizarre scene.
Several tiger sharks and at least one great white shark were reported to have been feeding on the carcass.
Williams said he’d seen the sharks, including the great white, before he jumped in. But that didn’t put him off taking the leap.
“He was too busy chomping on the whale so wasn’t too bad,” he told Seven Network.