WATCH: Crocodile attacks handler at sanctuary

A young female trainee handler at the Billabong Sanctuary in Townsville is in hospital after she was attacked by one of the crocodiles in an enclosure at the tourist spot.

A 2.5 metre croc came out of the water and dragged 25-year-old Renee Robertson to the ground in front of shocked onlookers.

Robertson received a "significant arm injury" and after receiving emergency surgery is expected to make a full recovery. 

WARNING: Some people find this footage is distressing.