According to a report in The Cairns Post, Snakehead fish have already been discovered on the southern coast of the neighboring island to the north, Papua New Guinea. The fish can grow up to three feet in length and are known to eat water birds, snakes and rodents. Snakehead fish are able to venture out of the water in search of prey which it devours whole.
Species of Invasive Fish Walk on Land, Climb Trees
This is a Snakehead fish, but you can just call him "Fishzilla."