Tough customer: This bad-tempered shortfin Mako shark circled a photographer's boat for two hours and only left after filling up on bait which was thrown into the water
These terrifying pictures show the moment a photographer was circled by a hungry shark - for two hours.
Brave Sam Cahir refused to panic during the real-life Jaws scenario - getting in the water with his camera to capture these incredible shots.
Australian Sam had been taking part in a Great White tagging trip when he found himself face-to-face with the deadly predator off the Neptune Islands, South Australia.
Predator: Sam Cahir had been taking part in a tagging trip in the Indian Ocean when he found himself face-to-face with the vicious fish
The Shortfin Mako shark - which have been known to attack humans eventually left after eating tuna baits thrown into the water.
Sam said: 'The Mako made some menacing passes. On a number of occasions she almost swallowed the camera whole, allowing me to shoot straight down her maw.
'It was a once in a lifetime opportunity. I feel humbled to have witnessed such a display of nature's quirkiness.'
Sam was taking part in work carried out by the Fox Shark Research Foundation, which was set up by Andrew Fox, the son of famous shark attack victim Rodney Fox, in notorious shark infested waters.
Brave: As the Mako circles the boat relentlessly, Sam Cahir slowly edges his way into the water to get some pictures
Sam said: 'When I saw the shark I couldn't get in the water fast enough to get some pictures.
'I couldn't believe what I was seeing up close. This Mako was audacious, bordering manic.
'At one point I had a Great White and a Mako circling for the tuna bait. The Mako literally browbeat away a Great White and not just any Great White Shark but a very large dominant male maybe six times her mass and twice her size - it was amazing.
'Once the Great White left, the Mako decided I was the next threat to her free meal. She circled me for around two hours making intimidatingly close passes.'
Snappy temper: The Shortfin Mako shark - which have been known to attack humans - eventually left after eating tuna baits thrown into the water
source: dailymail