Shrimp are farmed in enormous numbers globally. Evidence for crustacean sentience has grown significantly, raising welfare questions about farming and processing practices used at massive scale.
Shrimp welfare sits at the intersection of massive scale — hundreds of billions of individuals — and genuine scientific uncertainty about crustacean sentience. The precautionary argument for taking shrimp welfare seriously has strengthened considerably since the UK's 2021 recognition of decapod sentience. Evidence of nociception, opioid-system function, and learned avoidance suggests that shrimp can suffer. Eyestalk ablation — widely used to manipulate reproduction in farmed shrimp — likely causes acute pain and is a clear target for welfare reform. High stocking densities cause chronic stress. Ammonia-bath or ice slurry killing methods used at processing scale cause prolonged distress if shrimp are sentient. The Shrimp Welfare Project and similar organisations are working to develop industry welfare standards commensurate with the scale of shrimp farming.