Red king crabs are one of the world's most valuable seafood species. Whether wild-caught in the Bering Sea or explored for aquaculture, their welfare during capture, holding, and processing raises significant ethical questions.
King crab welfare involves two distinct phases: capture/holding and slaughter. In wild capture, crabs endure pot confinement, overcrowding, and air exposure during sorting on deck — air exposure causes desiccation and physiological stress. Live holding in tanks reduces stress compared to dry storage but requires careful water quality management. Slaughter by live boiling is the dominant method despite evidence that crustaceans experience pain — the time to unconsciousness in boiling water is measured in seconds to minutes, during which nociceptive responses continue. Spiking (penetrating the central ganglion) or chilling prior to boiling reduces the duration of any aversive experience. The UK's Animal Welfare (Sentience) Act 2022 recognises decapod crustaceans as sentient, potentially driving future slaughter welfare regulation. Consumers and industry should support research into humane killing methods for large crustaceans.