The question of whether aquatic invertebrates such as crabs, shrimp, and cephalopods can suffer is increasingly supported by behavioral and neurological evidence, challenging assumptions about which animals warrant moral consideration.
The accumulating evidence for invertebrate sentience means that billions of animals currently outside welfare protection may be capable of suffering. Live boiling of lobsters and crabs, a common commercial practice, may inflict significant pain. Fishery bycatch of crustaceans, transport in dry conditions, and slaughter methods in aquaculture all warrant reconsideration. While scientific certainty remains incomplete, the precautionary principle suggests that industries and consumers should begin adopting more humane practices now rather than waiting for definitive proof.