Crabs are slaughtered by boiling or mechanical methods with limited consideration of welfare. Precautionary stunning approaches are gaining recognition.
Crab slaughter welfare sits at the intersection of scientific uncertainty and enormous scale. While definitive evidence for crab consciousness is absent, behavioral responses to noxious stimuli justify precautionary protection. The UK Sentience Act's inclusion of decapod crustaceans reflects a policy response to mounting evidence. Adopting more humane processing methods has low cost and potentially large welfare benefit.