The state’s Forest Practices Code requires a 30m buffer of trees around waterways containing giant freshwater crayfish, but this does not apply to headwaters that feed into such areas.

A Tasmanian giant freshwater lobster. News Corp Australia Giant Aussie lobsters — which can break bones, live over 60 years and grow to the size of your average dog — are facing extinction.

The largest crawfish species in the world is Australia's Tasmanian giant freshwater crawfish, which can reach 7 pounds in weight. Looking for the best crawfish bargain? Then don't buy big ones.