A couple of fishermen had a terrifying close encounter with a great white shark.
Jordan Marshall and Paul Marriott were out fishing in Catherine Bay in western Australia when the huge shark headed towards them.
Shocking footage caught by the pair shows the shark swimming around the boat before suddenly becoming aggressive and thrashing around in the water.
In the clip, one of the men can be heard to say: "Holy s***, that is a beast... Oh, he's going at the motor. Sheesh, woah, yeah, f***."
Speaking to Nine News, Jordan said: "It was quite daunting actually.
"He [Marriott] was a bit more game than me, patting the water and doing that kind of stuff."
Paul said he had been 'angling a couple of mullets, trying to get him up close', but the shark wasn't interested.
Paul added: "We'd tucked into a couple of beers by then so we sort of let him go off and do his own thing."
Earlier this year, a photographer in the US managed to capture footage of a great white shark moving at an unnerving pace.
Larmand told For the Win: "He was going at least 20mph. I was going full throttle on the drone trying to catch up to him."
He added: "I'm not sure what triggered him to burst into speed like that; I've never seen one do that."
Chris Lowe, director of the Shark Lab at California State University, told the news outlet that the shark was most likely spooked after spotting the drone's shadow.
He explained: "This response to the shadow of the drone supports one reason why they hang out in shallow waters.
"They don't know what is a threat and the safest behaviour is to flee when they experience something unknown.
"What's also interesting is that babies will exhibit this rapid flight in one direction, while older sharks will do a loop around when scared.
"This doubling back on a potential threat is a typical predator behaviour to prevent a rear attack."