Growing evidence of crab sentience has elevated welfare concerns about commercial handling, live storage, and killing practices in the global crab industry.
Crab welfare in commercial contexts remains poorly regulated despite significant evidence of sentience. Live storage in crowded tanks without adequate oxygen causes physiological stress and fighting that results in limb loss and injury. Extended live transport out of water causes respiratory distress in water-breathing species. Boiling live crabs — standard in cooking — may cause several minutes of suffering before death occurs. Electrical stunning has been shown to work effectively on crabs and is more humane but is not widely adopted. The economic scale of the crab industry — millions of tonnes annually — means even small per-animal welfare improvements have enormous cumulative impact. Switzerland requires stunning before killing; other jurisdictions are considering similar requirements following the recognition of decapod sentience.