Tilapia are among the most widely farmed fish globally. Their welfare depends critically on water quality, stocking density, and appropriate management practices.
Tilapia welfare in intensive aquaculture is significantly affected by stocking density and water quality management. Overcrowding suppresses immune function, increases aggressive interactions, and causes chronic physiological stress. Oxygen depletion events cause acute suffering and mass mortality. Tilapia have pain receptors and behavioral responses to noxious stimuli consistent with sentience. Welfare improvements — lower stocking densities, continuous water quality monitoring, and enriched environments — are achievable within commercial production systems.