Rainbow trout are one of the most widely farmed freshwater fish species. Research into trout pain responses and behavior is driving improvements in aquaculture welfare standards for this important food fish.
Trout welfare in aquaculture is receiving increasing scientific and regulatory attention as evidence of fish sentience becomes more robust. Key welfare risks include overcrowding, inadequate water oxygenation, disease pressure from high densities, and inhumane slaughter. Practical welfare improvements include reducing stocking densities to evidence-based thresholds, improving water quality monitoring, implementing effective stunning before slaughter, and reducing handling stress through better net design. Certification programs that include specific trout welfare criteria are emerging and provide market incentives for producers to invest in welfare improvements.