Shrimp farming produces hundreds of billions of animals annually under conditions that raise serious welfare concerns — at a scale that dwarfs almost any other farmed species.
Shrimp welfare sits at the frontier of animal ethics precisely because of scale and scientific uncertainty. If shrimp experience any form of suffering, the aggregate welfare impact of current production practices — given that hundreds of billions are farmed annually — is enormous. Evidence for shrimp sentience includes responses to noxious stimuli, avoidance learning, and anxiety-like states modifiable by analgesics. High density, poor water quality, and disease outbreaks all create conditions where welfare harms could be substantial. Slaughter methods — typically freezing or boiling alive — are not designed with welfare in mind. The Shrimp Welfare Project is at the forefront of developing industry standards; progress is possible but requires sustained attention.