The Queensland government will hold a shark summit in the Whitsundays this week, in a bid to find a long-term solution to stop attacks in Cid Harbour.
A paramedic was on the scene to assess and treat the man, before he was airlifted to Mackay Base Hospital on Queensland's east coast at about 8.30pm (11.30pm NZT).
It's the third serious shark attack at Cid Harbour in two months, leading to calls to prevent shark attacks, including putting drumlines in the region permanently.
A doctor on holiday with a group of friends in Australia has been killed by a shark which attacked him after he jumped into the water from a paddleboard.
"It's not a fallacy (sharks attack at dusk), but it's more prevalent with bull sharks ... the majority of bull shark attacks are after five in the evening and before eight in the morning", he said.
She lost a lot of blood, and a doctor on a nearby boat is credited with saving her life, the Australian Broadcasting Corporation reported Monday.
The Whitsunday Water Police will be conducting patrols of Cid Harbour today along with vessels from other Queensland and Commonwealth Government agencies.
State Tourism Minister Kate Jones says expert advice suggests drumlines are not the most effective method of controlling shark populations.
According to the International Shark Attack File database at the Florida Museum of Natural History, there is a one in 3,748,067 chance of dying from a shark attack.
He was suffering significant thigh, calf and wrist injuries and couldn't be saved.
46-year-old Justine Barwick and 12-year-old Hannah Papps both survived, with the young girl losing her leg.
Insp O'Connell said Dr Christidis' friends were "extremely distraught".
"I've been in the Whitsunday area on and off for 30 years and apart from some minor nips and bites I've never heard of substantial attacks like what we've seen in these three attacks".
Drum lines are aquatic traps that use a series of buoys and baited hooks to lure sharks.
Signs will be installed around the area warning people not to go swimming there, Jones said, adding that, "Neither the local mayor, Andrew Willcox, marine authorities nor local tourism operators want to see drum lines redeployed".
"We have to make an assumption it was a tiger given the amount of tigers they caught in Cid Harbour following the last attack", Mr Long said.