Edible crabs are caught commercially in large numbers around UK coasts. As decapod crustaceans, they are probably sentient, making welfare during capture, storage, and slaughter an ethical priority.
Edible crabs are caught primarily by creel/pot fishing — a selective, low-damage method that allows crabs to enter traps voluntarily and remain in relatively natural conditions until haul. This is welfare-superior to trawling, which causes physical trauma, crushing, and temperature shock. Creel-caught crabs typically reach holding facilities in better physiological condition than trawled animals.
Live holding and transport present welfare challenges. Crabs in vivier trucks or storage tanks experience crowding, handling, and temperature fluctuations. Maintaining appropriate cold temperatures, adequate oxygenation, and salt water quality reduces stress during holding. Minimizing holding duration reduces cumulative stress exposure before slaughter.
Live boiling of conscious crabs is the traditional slaughter method and causes welfare harm if crabs are sentient. Chilling in ice slurry before boiling reduces temperature to near-immobilizing levels. The Crustastun device provides effective electrical stunning for crabs, rendering them immediately insensible before killing. Consumer demand for humanely killed crab can incentivize industry adoption of better slaughter methods.