Shrimp aquaculture produces over 5 million tonnes annually, making it one of the world's largest aquaculture sectors. The welfare of farmed shrimp has received increasing scientific and public attention, particularly following evidence that decapod crustaceans including shrimp may be sentient—capable of experiencing suffering.
The 2021 Birch review for the UK government concluded that decapod crustaceans (including shrimp) warrant inclusion in animal welfare legislation based on evidence for sentience. Key evidence includes: nociceptors responsive to noxious stimuli, neural responses to injury, protective and avoidance behaviours following damage, evidence of sensitisation and learning, and evidence of motivational states consistent with pain experience. This evidence base supports applying precautionary welfare protections to farmed shrimp.
Key welfare concerns in shrimp aquaculture include: Stocking density—intensive systems stock at densities far exceeding natural conditions, causing chronic stress and aggression; Water quality—deteriorating oxygen, ammonia, and pH levels in high-density systems cause physiological stress; Disease—viral diseases (white spot syndrome, early mortality syndrome) cause mass mortalities with significant suffering; Handling and harvesting—methods including crowding, netting, and aerial exposure cause stress; Killing methods—live chilling or ice-slurry methods may not cause rapid loss of consciousness.
Eyestalk ablation—removal of one or both eyestalks to induce hormonal changes that accelerate sexual maturation and spawning in female broodstock—is a widespread industry practice that raises significant welfare concerns. The eyestalk contains major endocrine glands and neural tissue; ablation is performed without anaesthesia in most operations and likely causes pain and chronic stress. The practice is increasingly recognised as a welfare problem, and research into alternative maturation induction methods is a priority.
Disease outbreaks are a major cause of shrimp suffering and mortality in aquaculture. Bacterial and viral diseases in crowded conditions spread rapidly. Antimicrobial use in shrimp farming is significant and contributing to antimicrobial resistance, a public health concern. Improving biosecurity, reducing stocking density, maintaining water quality, and developing vaccines offer welfare-positive alternatives to reactive antimicrobial treatment.