Tilapia is one of the world's most farmed fish, produced in warm-water systems globally. Welfare challenges include crowding stress, temperature extremes, and inadequate water quality management.
Tilapia welfare suffers from limited research attention despite the enormous production scale. The combination of high stocking densities, variable water quality management across global production systems, and limited welfare regulation creates conditions where welfare harms likely occur at scale. Tilapia's hardiness has been used to justify minimal welfare consideration, but hardy does not mean insensitive - tilapia show behavioral and physiological stress responses that indicate welfare problems at high densities and poor water quality. The global distribution of tilapia farming across low and middle income countries with minimal aquaculture welfare regulation means that production conditions vary widely. Consumer and retailer pressure for welfare standards is less developed for tilapia than for salmon or shrimp, making this an area where advocacy can have significant impact.