A 68-year-old man had to fend off a huge 12-foot tiger shark with a diving knife after it "ripped off a good chunk of his buttock."
The Hawaii man, who has not been identified, was going for his daily swim off the coast of Anaehoomalu Bay on Tuesday at around 8.15am when he was suddenly bitten by a shark.
Eyewitnesses claim the man, from Waikoloa, US, was roughly 400 yards out in the sea when he was attacked by the 12-foot predator.
