Insane footage shows a massive shark aggressively thrashing in the water while chasing a seal in a Melbourne bay popular with swimmers
Astonishing footage has emerged of a shark hunting down a seal near a popular swimming spot off Victoria's Mornington Peninsula.
A group of mates enjoying a day on a boat filmed the encounter with a bronze whaler that was violently thrashing around just metres away from them off Portsea on the weekend.
'Oh my God! Dad, stop, stop!' a man is heard exclaiming in the footage. 'It's chasing a seal! Oh my God! Holy moly, this is crazy!'
A group of men enjoying a day on Port Phillip Bay filmed their encounter with a shark as it aggressively chased its prey
The men get a better look at just how big the predator is as the shark swims closer to the boat while chasing its prey.
'What is this! Oh my God, that's massive!' the man excitedly says. 'It's right there!'
Another mate suggested the shark may be chasing fish rather than a seal.
'Well, whatever it is, it's chasing it,' the first man replies.
Another video shows the men's horror as the shark closes in on the boat.
The men are heard exclaiming that they'd never seen a bronze whaler so big
'Oh s**t, I've never seen one that f**king big,' another man says.
'That's enough for me! As long as he stays down there.'
Despite their size and aggressive behavior, bronze whalers - also known as copper sharks - aren't usually a threat to humans.
The species is responsible for just one fatal attack in Australia, at Bunker Bay off Western Australia's coast in 2011.
The extraordinary footage of the massive shark was filmed off Portsea