Australia is home to the three largest freshwater crayfish in the world ...

Crayfish Species Copyright 1996 Sam McDonald By Sam McDonald saltysam@sound.net May 15, 1996 Papershell Crayfish Orconectes immunes (Hagen) This rather plain, gray-green crayfish is characterized by a pale central zone along the middle of the carapace and abdomen. The pincers are orange- tipped, and in mature males are uniquely tinged with purple. The rostrum is without lateral notches or spines ...