Shrimp farming produces over 5 million tonnes annually, with welfare questions about decapod crustacean sentience applying to animals whose numbers dwarf almost all other farmed species combined.
The scale of shrimp farming makes it one of the most significant welfare issues in food systems even at low probabilities of sentience. If farmed shrimp have any capacity for negative experience, then the hundreds of billions of individuals subjected to eyestalk ablation, extreme crowding, and inhumane slaughter represent welfare harms of staggering magnitude. Eyestalk ablation alone — an invasive, painful procedure performed without analgesia on billions of breeding females annually — would be one of the most widespread painful procedures performed on any animal category in food production. The Shrimp Welfare Project and similar organizations are working to accelerate research on shrimp sentience, develop alternative breeding methods that do not require ablation, and advocate for welfare standards in shrimp certification schemes. The precautionary principle, given current sentience evidence, strongly suggests that improvements are warranted.