Tilapia are among the most widely farmed fish globally, with welfare outcomes highly dependent on stocking density, water quality, and management practices.
Tilapia welfare challenges arise primarily from the intensity of production systems enabled by their physiological hardiness. Because tilapia survive poor conditions, there is little economic incentive to improve them — the welfare costs (chronic stress, aggression, immune suppression) are borne by the animals rather than appearing directly in production losses until disease epidemics occur. Welfare-focused tilapia farming prioritises water quality management and stocking density limits that allow fish to express more natural social behaviour.