Aquaculture

Farmed and Wild Crayfish Welfare

Crayfish farming and the invasive species trade raise welfare and ecological questions.

Key Facts

Signal crayfish are invasive in the UK and destroying native white-clawed crayfish
Farmed crayfish are caught with traps and typically boiled alive
Research suggests crayfish show pain-avoidance learning
Live crayfish trade has spread diseases across continents

Welfare Considerations

Crayfish boiled alive experience whatever level of pain their nervous systems can generate during the process — the evidence is contested but precautionary humaneness is warranted. Signal crayfish introduced into UK rivers destroy native species and river habitats, causing ecological damage at scale. Improved slaughter methods and stricter controls on trade would reduce both animal and ecological harm.

What You Can Do

If consuming crayfish, choose humanely killed products
Never release invasive species including signal crayfish into waterways
Support native crayfish ark site conservation
Advocate for stricter live crustacean import and trade regulations