Tilapia are the second most farmed fish globally yet receive minimal welfare attention. Their specific needs and the scale of production make tilapia welfare a significant global issue.
Tilapia welfare sits at the intersection of scale and neglect: more tilapia are farmed than almost any other fish species, yet welfare research and standards for this group are substantially less developed than for salmon. The dominance hierarchies that emerge in high-density tanks create persistent social stress for subordinate individuals; poor water quality causes chronic physiological distress; and the temperature sensitivity of the species means that management failures can cause mass mortality from cold stress. The hormone treatment used to produce monosex populations raises welfare questions that have not been adequately investigated. The growth of tilapia aquaculture into a global food security staple makes establishing welfare standards particularly important: the potential welfare impact of improvement at scale is enormous.