Terrifying video shows one of the best surfers in the world fighting off a shark attack

Professional surfer Mick Fanning fought off a shark on live TV during the finals of the J-Bay Open of the Men's Samsung Galaxy Championship Tour in South Africa.

He's OK.

The 34-year-old Australian told a reporter afterwards that he "punched it in the back."

Fanning is currently ranked the 4th best surfer in the world for 2015.

Check out the video clips below:

Here's a shot of the shark's fin creeping up on his surfboard.