The welfare of lobsters has become a significant ethical and scientific debate. Evidence of pain sensitivity has prompted some countries to ban traditional boiling methods and implement stunning requirements.
The lobster welfare debate reflects broader uncertainty about invertebrate sentience. But the evidence is strong enough that several countries have legally acted to protect lobsters from unnecessary suffering. Traditional live boiling without stunning is likely to cause significant distress given lobsters behavioral responses to heat. The availability of electrical stunners means the practice of live boiling without stunning is increasingly difficult to justify on welfare grounds.