Aquaculture Fish Welfare in Farm Conditions

Fish farming is the fastest-growing food production sector, but welfare standards for farmed fish lag far behind other species despite growing evidence of fish sentience and suffering.

Key Facts

Aquaculture now produces more fish by weight than wild capture fisheries
Atlantic salmon, the most farmed finfish species, experience high rates of sea lice infestation
Sea lice cause open sores, tissue damage, and chronic pain in affected salmon
Stocking densities in salmon cages can reach 34 kg per cubic meter, severely restricting movement
Fish welfare legislation is absent or minimal in most fish-producing countries
Slaughter methods for farmed fish often involve CO2 asphyxiation, which causes distress
The Aquatic Animal Alliance estimates 73-180 billion farmed fish are killed annually

Welfare Considerations

Fish welfare has historically been neglected based on assumptions that fish do not experience suffering in morally significant ways. The scientific consensus has shifted substantially — fish show nociception, stress responses, and behavioral evidence of pain experience. In intensive aquaculture, fish face chronic stressors including high density, sea lice burden, poor water quality, and painful slaughter methods. The scale of fish farming means that even marginal welfare improvements would affect more individuals than all terrestrial farm animal welfare improvements combined.

What You Can Do

Reduce or eliminate farmed fish consumption, particularly from high-density systems
Choose fish products certified by welfare-conscious aquaculture standards
Support research into higher-welfare slaughter methods for farmed fish
Advocate for fish to be included in animal welfare legislation
Support organizations focused specifically on fish welfare in aquaculture
Ask retailers and restaurants about the welfare standards of their fish sources