Aquatic Animals

Aquaculture Escape and Wild Fish Welfare

Farmed fish escaping into wild ecosystems create welfare problems for both escaped fish and native populations.

Key Facts

Millions of farmed fish escape from net pens annually due to storms and equipment failure
Escaped Atlantic salmon compete with and interbreed with wild salmon populations
Escaped fish carry diseases and parasites that spread to wild counterparts
Closed containment systems eliminate escape risk but are more expensive

Welfare Considerations

Aquaculture escapes create welfare harm in two directions: escaped fish face novel predators and food sources they are not adapted to, causing significant mortality. Wild fish experience increased competition, disease exposure, and genetic dilution from escaped fish with different selective histories. Closed containment systems eliminate the problem but face economic barriers to widespread adoption.

What You Can Do

Support transition to closed containment aquaculture systems for salmon and trout
Advocate for mandatory escape prevention standards in open-net aquaculture
Choose farmed fish from closed containment systems when available
Support enforcement of escape reporting requirements for aquaculture operators