Tilapia is one of the world's most farmed fish, produced in intensive pond systems across tropical and subtropical regions, often under conditions that compromise welfare significantly.
Tilapia welfare is largely invisible to consumers despite the scale of production. Chronic low oxygen, overcrowding, and social aggression cause measurable physiological stress. The sex reversal process used to produce all-male monocultures involves feeding hormone-laced feed during the fry stage, raising questions about endocrine disruption effects. Unlike European aquaculture, where certification schemes and regulations provide some protection, tropical tilapia production operates in jurisdictions with minimal welfare oversight.