Aquaculture certification schemes have improved environmental standards significantly, but welfare coverage remains inconsistent and often incomplete across species and production stages.
Aquaculture certification presents a significant consumer communication challenge: labels that convey environmental sustainability do not necessarily indicate good animal welfare, yet consumers reasonably interpret them as covering welfare. ASC-certified salmon may be produced using slaughter methods that cause prolonged suffering; organically certified tilapia may be crowded and stressed despite compliance with density requirements. The certification gap is partly a function of welfare science being less developed than environmental science for aquatic species, and partly a function of consumer demand focusing primarily on environmental sustainability. As fish welfare science matures and consumer awareness increases, certification schemes are beginning to incorporate welfare criteria. Consumers who understand these gaps can advocate for more comprehensive welfare coverage from certification bodies.