Scientific understanding of pain and suffering in aquatic invertebrates - crabs, lobsters, cuttlefish, and others - has grown substantially. The UK Animal Welfare (Sentience) Act 2022 extended protection to decapod crustaceans and cephalopod molluscs, marking a watershed moment.
The extension of sentience recognition to aquatic invertebrates represents a major ethical advance, but the gap between scientific understanding and commercial practice remains vast. Billions of decapod crustaceans and cephalopods are caught, farmed, and killed each year using methods that cause significant suffering under evolving scientific understanding. Live boiling, chilling on ice (which causes prolonged immobility but may not prevent pain), and rough handling during commercial processing are all welfare concerns. The challenge for advocates is translating the legal and scientific recognition of decapod sentience into practical welfare improvements across global seafood supply chains - a task that requires both regulatory frameworks and commercial change.