Tour Operator David Pickering, 26, was bitten on the right forearm by what is believed to be a 3-metre tiger shark while guiding a group of snorkellers at The Lagoon, north of Coral Bay in Western Australia.
The incident happened about 100 metres from the shore at around 2pm on 19 January 2012.
According to press reports Pickering suffered tendon damage, but his injuries were not life threatening.
The Royal Flying Doctor Service, which flew in to pick him up, said he suffered some nasty lacerations to his forearm and that he was being taken to Perth for treatment. He was reported in stable condition.
According to press reports, another operator said he highly doubted it would be a tiger shark claiming it was more likely to be a reef shark that bit Pickering since there were thousands in the area.
No other details were immediately available.