James Cook University shark researcher Professor Colin Simpfendorfer said it was hard to understand why the attacks have happened because there has been little research on shark behaviour in the Whitsundays.
The 33-year-old died after being airlifted to a mainland hospital, the national broadcaster ABC said.
"Despite their best efforts, the injuries were too severe", O'Connell said.
"At this stage we are taking the advice of the locals on ground and both the council and Tourism Whitsundays advise that they'd prefer not to have drum lines", Ms Jones said.
All three attacks took place in Cid Harbor, off the coast of the Whitsunday Islands, which lie between the northeast coast of Queensland and the Great Barrier Reef.
An spokesperson for Austin Health in Melbourne, where Christidis was a research fellow in the urology department, told the Brisbane Times Tuesday that the department was "devastated by the news". The species of shark that attacked Christidis has not yet been identified.
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In September, two shark attacks occurred within a day of each other.
They anchored 23 kilometers from Airlie Beach in Cid Harbor, intending to spend their first night in the protected mooring location on Whitsunday Island, the largest uninhabited island of the group, O'Connell reported.
"It sounds to me that the animal came back or stuck around, so to me, that's more than an investigatory bite", she said.
"It a bad tragedy", he tells Chris Smith.
Late last week, a petition with 782 signatures was tabled in the Queensland Parliament calling for the government to immediately stop using shark nets and drum lines to stop the "carnage" inflicted by the shark control program.
"What the tourism industry is saying to me is that they want long-term solutions, not knee-jerk reactions and that's exactly why we intend to sit around the table with the scientific experts and the tourism industry to work on solutions", she said.
A male patient is now being airlifted to Mackay Hospital with significant leg and wrist injuries following a shark attack in waters near #CidHarbour which occurred at 5.37pm.