Man survives 'head-on' bull shark attack at nudist beach in Australia
The 50-year-old said he punched the shark until it let go before desperately running out of the water.
He said: "I think [my arm] got the end of his mouth because his head was bigger than [the size of the bite mark], it's not just a little head like that.
"But I think he just turned and snapped and just got the end of it and just missed an artery, thank God.
"I was coming in. So I went to move out a bit deeper to get a better wave and just put my head down and headbutted it and then it just grabbed me, and I just started punching it until it let go.