If they get to be adults, nothing except for humans! However, juveniles are preyed on by platypus, rakali (native water rats), large fish, such as the river blackfish and other crayfish -including adult giant freshwater crayfish.



Protecting Habitat for The Giant Freshwater Crayfish
If they get to be adults, nothing except for humans! However, juveniles are preyed on by platypus, rakali (native water rats), large fish, such as the river blackfish and other crayfish -including adult giant freshwater crayfish.