Water quality is the foundational determinant of welfare in farmed fish. Poor oxygen levels, ammonia buildup, and pathogens cause chronic suffering in billions of aquaculture animals annually.
Fish experience genuine suffering under poor water quality conditions. Hypoxia causes panic-like escape behavior and physiological damage. Chronic ammonia exposure impairs neurological function. High stocking densities compound these problems. Modern high-welfare aquaculture uses continuous monitoring, low stocking densities, and optimized feeding to minimize water quality stress. The gap between best and worst practices in the industry is enormous.