Pangasius catfish farmed in Vietnam's Mekong Delta provides affordable seafood globally but faces welfare scrutiny over stocking density, water quality, and processing practices.
Pangasius welfare in intensive Mekong Delta production is influenced significantly by water quality management at scale. Oxygen depletion in high-density ponds during algal crashes or poor water management causes acute hypoxic distress before mass mortality events. The species air-breathing capacity enables the extreme stocking densities used in production, but this tolerance should not be interpreted as absence of welfare needs. Chronic overcrowding causes social stress and disease susceptibility. High-throughput processing raises slaughter welfare concerns about the proportion of fish that are fully stunned before killing. The global scale of pangasius production — supplying affordable white fish to markets worldwide — means welfare improvements at this sector level have enormous aggregate impact.