Heart-thumping moment massive tiger shark explodes out of the water and attacks kayaker off Hawaii

THIS is the shocking moment a huge tiger shark attacked an unsuspecting kayaker.

Scott Haraguchi was in the water off the coast of Hawaii when the massive beast suddenly leapt out of the water.

He had been using a GoPro to film his fishing antics when the shark made a beeline for his boat.

Heart-stopping footage shows the shark thundering towards the kayak before launching itself at Scott.

The shark can be seen opening its jaws as it crashes into the boat while Scott screams.

He told he heard a "whooshing sound" coming at him rapidly.

Scott added: "I looked up and I saw this big brown thing.

"My brain thought it was a turtle but then I got slammed by it and realised it was a tiger shark."

Thankfully Scott had a lucky escape as he managed to kick the shark away.

He fears the toothy predator may have mistaken his kayak for a seal.

Tiger sharks can grow up to 25 feet long and weigh up to 1,400 pounds and are said to be responsible for more attacks on humans than any species apart from great whites.

It comes after a surfer was seriously injured after being bitten by a tiger shark off Hawaii's coast.

Medics said that the man, 58, was given life-saving treatment at the scene.

Meanwhile, search teams are hunting for the body of a beloved teacher who was ferociously savaged by a shark while surfing in Australia.

Simon Baccanello, 46, was reportedly dragged underwater for over 15 minutes by the beast at Walkers Rock on the west coast.

He disappeared on Saturday morning after horror struck as he rode the waves at the popular beach.

The local teacher, who began working at Elliston Area School in January, is said to have been ambushed while 50 metres offshore.

Simon is said to have been surfing at around 10am when he was suddenly mauled by a shark in front of horrified onlookers.

Around 16 people, including a 13-year-old boy, were in the water and watched the attack unfold just metres away from them.

Bystanders told how Simon bravely warned others to swim back to shore as he battled against the beast.

Eyewitness Jaidan Millar, 22, said the shark pounced on the teacher several times as he desperately tried to fight it off.