Crayfish farming is expanding globally, but their sentience and welfare needs are poorly understood. Emerging evidence suggests they deserve greater moral consideration.
Farmed crayfish represent an emerging welfare frontier as evidence accumulates that they are more sentient than previously assumed. Research demonstrating anxiety-like states, conditioned avoidance learning, and nociceptive responses suggests these animals can suffer in ways relevant to moral consideration. The scale of production — hundreds of millions of individual animals — means that even modest welfare improvements could benefit enormous numbers. Current farming and handling practices, including crowded transport without stunning before killing, likely cause significant suffering. The welfare regulatory gap for crayfish is large, with most jurisdictions applying no specific standards. Bringing crayfish welfare into the same framework as other crustaceans recognised as sentient should be a policy priority.