Crabs are caught and farmed in enormous numbers globally for food. Growing scientific evidence for decapod crustacean sentience has placed the welfare of crabs — particularly killing methods including live boiling — under increasing ethical scrutiny.
The welfare case for more humane crab killing has become substantially stronger following the LSE sentience review and the UK's legislative recognition of decapod welfare. Live boiling of crabs — the standard consumer and commercial practice — causes a period of pain and distress that precedes death by minutes. If crabs can experience pain (as the evidence increasingly suggests), this represents a large-scale, preventable welfare harm. The solutions are technically available and not prohibitively expensive: spiking before boiling takes seconds and eliminates the period of conscious suffering. CrustaStun devices are available to commercial processors. The barrier is primarily lack of consumer awareness and regulatory requirement. The precautionary welfare principle is clear: when evidence suggests sentience and humane alternatives exist, those alternatives should be used.