A husband from his surfboard leapt on to a shark that was attacking his wife, repeatedly punched it until it let go to saving his wife.
Chantelle Doyle, 35, was surfing off Shelly Beach at Port Macquarie, New South Wales, when the attack took place.
Her husband, Mark Rapley, punched the shark until it released its grip and then helped Ms Doyle to the shore.
She was airlifted to hospital with serious injuries to her right leg.
Ms Doyle was reportedly mauled by a juvenile great white shark up to 3m in length.
Inspector Andrew Beverley, of Ambulance NSW, said people on the beach administered first aid to Ms Doyle before medics arrived.
“The bystanders on scene that rendered assistance should be commended. They did an amazing job,” he said.
He added that it was the third serious shark attack on that stretch of coast in recent months.
Ms Doyle was flown to Newcastle Hospital for surgery and was in a stable condition.