Man Bitten By Shark At WA Beach

A bodyboarder has been bitten by a shark at a beach south of Perth.

A bodyboarder has been flown to Royal Perth Hospital after he was bitten by a shark at a beach south of the city.

St John Ambulance says the injured man is believed to have "suffered traumatic injuries to a foot and ankle."

Police say the man, aged in his 20s, was at Pyramids Beach at Dawesville about 8.30am on Sunday when he felt something grab his leg.

Police said in a statement the injuries were not believed to be life-threatening. Surf Life Saving WA tweeted that Pyramids Beach would be closed for the next 24 hours due to "a shark encounter".

Damian Baker, who was on shore, said two surfers were in the water when a big school of salmon swam by them.

"They were in chest deep water, resting on their boards watching the salmon school," he told WA Today website.

"The shark alarm went off and I raced there with a couple of guys, the surf lifesavers were already there.

"He had been attacked on the lower part of the leg, with a couple of meaty bites."

Police originally said the man had been sitting on rocks with his legs dangling in the water when he felt his leg being grabbed.

It's the latest shark incident in Australia, including the fatal mauling of a young Victorian doctor in Queensland's Whitsunday Islands last week.

More to come.