Tilapia is one of the world's most widely farmed fish, particularly in developing countries. High stocking densities and variable management create significant welfare challenges in tilapia aquaculture.
Tilapia welfare in aquaculture presents different challenges than salmonid welfare, partly because tilapia's higher physiological tolerance to poor conditions can mask welfare compromise that would be more visible in less robust species. Tolerating crowded, low-oxygen conditions is not the same as thriving in them, and tilapia under these conditions show measurable physiological stress, reduced immune function, and increased disease susceptibility. The global scale of tilapia production and the diversity of production systems across many countries makes welfare improvement challenging. International certification schemes are beginning to address tilapia welfare, but coverage is limited and standards are generally weaker than for salmon. Consumer awareness of tilapia welfare issues is low compared to awareness of salmon welfare.