Decapod crustaceans and cephalopods are increasingly recognized as sentient animals with capacity for pain and stress, prompting growing calls for welfare protections in fisheries, aquaculture, and laboratory settings.
The welfare of aquatic invertebrates sits at a frontier of both animal welfare science and public policy. The evidence for sentience in decapods and cephalopods has accumulated to the point where multiple national governments and scientific bodies have formally recognized their capacity for pain and negative emotional states. The practical welfare implications are significant: hundreds of billions of crabs, lobsters, crayfish, and shrimp are killed annually in food production using methods that have not been assessed for humaneness relative to their nociceptive capacity. Simple, affordable stunning methods are available for crabs and lobsters and have been mandated in some jurisdictions. The octopus aquaculture industry, still in early development, presents an opportunity to incorporate welfare standards from inception rather than retrofitting them into established practices.