Aquaculture produces half the world's seafood and is projected to grow further. Whether fish farming can be made ethical depends on species choice, production methods, stocking density, and slaughter standards — areas where significant reform is possible.
The ethics of fish farming is not a binary question but a spectrum shaped by species, conditions, and practices. Oyster and mussel farming is genuinely low-welfare-concern and highly sustainable. Atlantic salmon farming in high-density sea cages with poor lice management and CO2 slaughter is welfare-deficient and requires significant reform. Between these extremes lie hundreds of species and production systems with varying welfare profiles. The path toward ethical aquaculture requires species-appropriate welfare standards, pre-slaughter stunning requirements, stocking density limits, and independent auditing — all achievable with current knowledge. Consumer choice, certification schemes, and regulatory advocacy are the three parallel levers for driving industry-wide improvement.