Crabs, lobsters, shrimp, and other aquatic invertebrates are used in vast numbers in food production and research. Growing evidence of their sentience is reshaping legal and ethical frameworks around their treatment.
The extension of sentience recognition to decapod crustaceans in UK law represents a significant step in the moral consideration of invertebrate animals. However, legal recognition has not yet translated to mandatory welfare standards in their capture, storage, or killing. The standard practice of boiling crustaceans alive is increasingly scientifically indefensible given the evidence base on nociception and pain behaviour. Transitioning to welfare-positive killing methods — including electrical stunning for crabs and mechanical stunning for lobsters — is technically feasible and represents the most direct actionable improvement for a category of animals facing extraordinary scale of harm.