Research on pain and suffering in fish and other aquatic animals has advanced rapidly. Understanding the current scientific consensus has profound welfare implications for fishing, aquaculture, and policy.
The scientific evidence on fish pain and sentience has shifted dramatically in the past two decades, creating a significant ethical lag between what we know and how we treat fish. Billions of fish are killed annually through methods (asphyxiation, live crushing, ice slurry immersion) that would be considered inhumane for any animal whose pain we acknowledged. The welfare implications are enormous given the scale: if fish suffer, the total welfare burden of current fishing and aquaculture practices exceeds that of all farmed land animals combined. Regulatory responses have begun in some jurisdictions but lag far behind the science, leaving the vast majority of fish unprotected by any welfare standards.