The footage of paramedics working to save the life of a 12-year-old New Zealand girl who was viciously mauled by a shark in the Whitsundays has been released.

A rescuer's GoPro camera captured the moment the helicopter lands on one of the region's iconic white sands beaches before paramedics can be seen rushing over to the girl.

Paramedics worked on the 12-year-old girl, believed to be from New Zealand, for around 20 minutes before she was flown to hospital yesterday afternoon.

The girl was bitten on the upper thigh, severing her femoral artery and causing massive blood loss. She required 1.5 litres of blood on the way to hospital, where she remains in a critical condition.

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The girl, who had been holidaying with her father and sister when she went swimming in Cid Harbour, a popular tourist spot in north Queensland's Whitsunday Islands.

She was rushed to Mackay Base Hospital yesterday afternoon and was due to have surgery last night.

The Whitsundays are set to be covered in baited drum lines today due to the two savage shark attacks.

Less than 24 hours before the girl was bitten, Tasmanian woman Justine Barwick had been attacked in the same harbour, causing her to lose a significant amount of blood.

There are fears the same shark could be responsible for the both attacks.

Fisheries Queensland will set three baited drum lines in the harbour today in a bid to catch the shark or sharks responsible.

"It is possible that there's more than one shark involved in these unfortunate events," the department's shark control program manager Jeff Krause told the ABC.

"We don't normally go out and search for any sharks that may have been involved in a shark attack but due to the nature of these multiple attacks, Fisheries Queensland is going to deploy three drum lines in a bid to try and catch some of the sharks in that area."

Krause said various types of whaler species as well as bull and tiger sharks can be found in waters around the harbour and he advised against swimming in or near Cid Harbour for the time being. Fisheries officers and water police were also patrolling the area.

The last attack in the area was eight years ago.

The two attacks, both attended by the RACQ helicopter teams, had hit Queensland's paramedics hard, operations manager Tracey Eastwick said.

"It is horrific ... for us as a community of paramedics it is quite confronting to have two similar incidents in the space of less than 24 hours," she told reporters.

Justine Barwick was snorkelling at Cid Harbour on Wednesday evening when the attack occurred.

Barwick, a mother of two, would likely have bled to death without the quick-thinking actions of people in nearby boats.

"I just saw this yacht anchor about 60 metres off my boat, there appeared to be six people on board and they all seemed to be laughing and all that," witness Mark Yates told national broadcaster ABC.

"Twenty minutes later there was this screaming and I thought 'geez, they seem to be having fun', and then the screaming kept continuing and I got up to have a look and I saw them dragging the poor woman out of the water. There was blood everywhere."

In a stroke of luck a rescue helicopter scrambled to the region was just 15 minutes away from the scene due to an earlier operation they'd been undertaking.

The hovering chopper drew the attention of John Hadok, an emergency department doctor from Mackay Base Hospital, who was sailing nearby and soon joined the effort to save Barwick's life.

Hadok's direction ensured correct first aid was given to Ms Barwick, allowing her to be safely winched into the helicopter.

RACQ CQ Rescue Helicopter crewman Ben McCauley said the doctor and others who gave first aid to Ms Barwick before she was winched aboard had likely saved her life.

"The original first aid was actually really well done," McCauley told reporters on Thursday.

"We actually didn't have to do anything with the leg, it was pretty much tourniqueted up, bandaged up and bleeding had stopped. They'd done a really good job."

Although he didn't see the wound, McCauley was told Barwick had "quite a big chunk of leg taken" and had suffered arterial bleeding.

"She did suffer a lot of blood loss. There was quite a lot of blood around the boat," McCauley said.

"We were told there was arterial bleeding … quite a big chunk of the leg taken, a few small puncture wounds on her calf muscle."