Aquaculture certification schemes have improved farmed fish welfare but significant gaps remain. Understanding what existing labels cover — and what they miss — guides more informed seafood purchasing.
Aquaculture certification welfare gaps reflect the challenge of developing meaningful welfare standards for species where welfare science is less mature than for terrestrial animals. ASC certification has driven genuine improvements in stocking density, water quality management, and slaughter practices for certified farms — but the certified sector represents a minority of global production, and standards continue to evolve as welfare science advances. The most significant gaps include: welfare of cleaner fish used in salmon lice management (wrasse and lumpfish are often stressed or injured in salmon cages), welfare during routine procedures (grading, vaccination, anesthesia), and comprehensive assessment of behavioral needs beyond physical health. Consumers who choose certified aquaculture products are making a better choice than those who choose uncertified products — but should understand that certification sets a floor, not an aspirational welfare standard.