Length to about 230 mm. Rostrum with two or more pairs of prominent spines on edges. Inner wrist of claws has a patch of soft setae (hairs).
Body light green-blue to almost black, lighter specimens lightly flecked; purple bands on either side of upper abdomen; claws slightly darker than body; base of moveable finger white. Mature males are remarkable in having a bright red, soft strip on the outer part of the claw.
Habitat & range
Make short burrows around the waterline or underneath submerged rocks and fallen trees. Prefers permanent freshwater, and absent from acidic swamps and perched lakes.
Introduced to South-east Queensland through aquaculture, farm dams, and aquarium interests and now feral in Lake Samsonvale, Wivenhoe Dam, and freshwater sections of Bremer and Brisbane Rivers.
Originally native to tropical northern Australia from Daly River, Northern Territory, to Normanby River, Queensland.
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