Jason Longgrass, 41, is treated by paramedics after he was bitten on his right leg at Lefties, the second shark attack in Gracetown today.

    

A second man has been attacked by a shark off Gracetown on Monday just hours after a surfer was mauled in the same area.

Jason Longrass was bitten by a shark just hours after Alejandro Travaglini, a father of two from Margaret River, was attacked by a great white at Cobblestones surf break.

Channel 9 reporter Michael Stamp told 6PR a the 41-year-old Denmark man was mauled at Lefthanders break about 2.40pm, just two kilometres south of the first attack.

Mr Longrass said he had not realised the beach was closed, and said he saw a four-metre white pointer coming towards him.

Paramedics were treating him at the beach for reported minor leg injuries.

He told ABC News he had been “having a ball” in the water prior to the shark attacking, with other surfers having cleared out of the water.

“[It was] just heading straight for me, beelining straight at me … and just nailed the board,” he said.

A bite mark in a surfer's board after being attacked by a shark off the coast of Gracetown only hours after another attack earlier in the day on Monday.

    

“I knew straight away ‘don’t kick your legs, just swim’.”

WA shark expert Hugh Edwards said he believed drum lines should be deployed soon to catch the shark at Gracetown.

Mr Edwards, 85, said attacks on humans were so rare it was highly likely the same shark had attacked both surfers on Monday.

“Shark attacks tend to come in a series and if you can catch a shark that has been involved in an attack, that’s the way to go no question,” he said.

“But you have to do it quickly because the great whites are travelling fish and if you leave it until tomorrow the thing could be a hundred miles away.

“Gracetown is a notorious spot and I think there would be more attacks there than anywhere else in Western Australia.”

Mr Edwards, who has been studying sharks since the 1950s, said he had not heard of two people being attacked in the same day in the same area.

“Two attacks in one day at the same location is unusual,” he said.

“Shark attacks are so rare that it is far more likely to be the same shark.

“If it was a dog biting someone or a bull killing someone, there would be no question the animal should be put down, and the same with the shark.

“But you can’t catch every shark in the ocean because it is not practical and morally speaking it isn’t fair because the other sharks haven’t done anything.”

Opposition leader Mike Nahan said WA Premier Mark McGowan must act after two shark attacks in one day.

“West Australians understand human lives must be prioritised over sharks,” Dr Nahan said.

“It is a failure of leadership from Mark McGowan if he doesn’t act now.”