Rainbow trout is one of the most widely farmed freshwater fish globally, with established welfare research providing evidence-based guidance on stocking, handling, and slaughter.
Rainbow trout welfare is better understood than most farmed fish species, with validated welfare indicators including fin damage, stereotypic behavior, and immune function providing measurable outcome metrics. The most impactful welfare improvements are pre-slaughter stunning (percussive or electrical), reduced stocking density, and improved water quality management. Consumer demand for certified welfare trout products provides market incentives for farm-level improvement.