Emerging research on crayfish welfare reveals evidence of pain-like responses, anxiety, and learned avoidance that has implications for their treatment in aquaculture and as laboratory animals.
The precautionary principle argues that where evidence of sentience is present but not definitive, animals should receive welfare protection proportional to the evidence. Crayfish evidence now meets this threshold. The science does not yet confirm rich subjective experience, but behavioral and neurological data suggest that crayfish can suffer. Regulatory frameworks and culinary practices are beginning to adapt to this evidence.