The practice of boiling lobsters and crabs alive is increasingly questioned by scientists who find evidence of pain perception in these animals, prompting regulatory changes in some countries.
If lobsters and crabs experience pain in a morally relevant sense, boiling them alive causes significant suffering during the time before death. Scientific review panels convened in the UK concluded there was strong evidence of sentience in decapod crustaceans, prompting regulatory extension of welfare protections. The precautionary principle suggests that the possibility of experiencing pain, combined with the ease of alternative stunning methods, provides sufficient justification for requiring stunning before boiling commercially and in homes.