The boy, whose age has not been confirmed, was bitten at Myall Beach on Cape Tribulation Road, Cape Tribulation, at 3.50pm on Saturday, October 25.
A Queensland Ambulance Service spokesperson said the male teenager had been airlifted to Cairns Hospital in a stable condition.
The boy suffered leg and abdominal wounds.
The Queensland Department of the Environment, Tourism, Science and Innovation confirmed rangers were responding to the reported incident.