Crustaceans including crabs and lobsters are increasingly recognized as potentially sentient animals based on neurological and behavioral evidence, with welfare implications for fishing, storage, and killing practices.
Crustacean welfare is one of the most rapidly evolving areas of applied animal welfare ethics. The UK Government review that led to sentience recognition concluded that the evidence for pain experience in decapod crustaceans is substantial, though not conclusive. Crabs and lobsters have nociceptors, respond to local anesthetics, and show persistent avoidance of noxious stimuli — behavioral markers that welfare scientists associate with pain capacity. The traditional practices of live boiling, storage in distress-inducing conditions, and dismemberment while alive are being challenged by this emerging evidence. The scale of crustacean harvest globally — billions of animals annually — means that even modest welfare improvements would have enormous aggregate impact. Electrical stunning before killing represents a practical welfare improvement that the catering industry can implement at modest cost.