Red Claw Crayfish

Cherax quadricarinatus

The red claw crayfish (Cherax quadricarinatus), often called Australian redclaw, is a freshwater crayfish native to northern Australia and nearby tropical waters. Mature males develop a soft red patch on the outer claw, while both sexes show a smooth blue-green to brown shell and a relatively robust build. The species grows quickly, tolerates warm water, and has become important in aquaculture as well as the aquarium trade, which is why it is also watched closely for invasive risk outside its native range.

Aquaculture producers and aquarists manage red claw crayfish with attention to water quality, hardness, shelter, stocking density, and escape prevention. Newly molted animals are vulnerable, so hides and space reduce cannibalism. In ponds or tanks, they feed on sinking prepared foods, plant matter, and detritus, but poor filtration can quickly turn uneaten food into a water problem. Local rules matter because released crayfish can establish in warm regions and compete with native species. Breeders often separate sizes and track broodstock to improve growth, claw condition, and survival after molting.