Shrimp represent the most numerically significant farmed aquatic species, with tens of billions produced annually. Evidence for their sentience has prompted growing attention to pre-slaughter handling and killing methods.
The welfare at slaughter of farmed shrimp is a major unresolved issue in aquaculture. The most common commercial killing method is placement into ice slurry, which slows physiological processes but does not necessarily produce rapid insensibility in crustaceans - ice slurry chilling may cause prolonged distress before death. Boiling without prior stunning is similarly welfare-problematic. The sheer scale of production - tens of billions of animals annually - means even marginal improvements in slaughter method have enormous aggregate welfare implications. Electrical stunning equipment calibrated for shrimp species and sizes can produce rapid insensibility before killing, but adoption in commercial aquaculture remains limited. The Humane Slaughter Association has published guidance on crustacean slaughter, and the UK's recognition of decapod sentience creates regulatory pressure for improvement.