Freshwater crayfish farming is growing globally, with welfare concerns around density, handling, and slaughter that reflect broader questions about crustacean sentience.
Farmed crayfish welfare has received minimal regulatory attention despite growing scientific evidence of crustacean sentience. At high commercial densities, crayfish engage in aggressive interactions that cause injury, claw loss, and chronic stress. The behavioral evidence for crayfish pain experience — including avoidance learning, protective responses, and behavioral changes following injury — suggests these animals warrant welfare consideration similar to that now accorded in UK law. Producers who reduce density, minimize handling stress, and develop humane slaughter methods are ahead of current regulation.