European Eel Welfare in Aquaculture and Restocking Programmes

European eels are critically endangered and increasingly farmed from wild glass eel capture, creating both welfare and conservation challenges.

Key Facts

European eels are classified as Critically Endangered on the IUCN Red List
Glass eel capture for aquaculture relies entirely on wild-caught juveniles as eels do not breed in captivity
Intensive recirculating systems dominate European eel aquaculture
Eels show stress responses to handling, crowding, and poor water quality
Restocking programmes using farmed eels have uncertain effectiveness at population level

Welfare Considerations

European eel welfare in aquaculture involves the entire production cycle from wild glass eel capture through to harvest. Glass eel capture and transport cause significant acute stress and mortality. In recirculating aquaculture systems, crowding and handling stress are ongoing welfare concerns. Eels are sensitive to water quality and show pronounced stress responses to dissolved oxygen fluctuations. Their welfare in intensive systems requires active management of water quality, stocking density, and handling practices.

What You Can Do

Avoid European eel products unless from certified sustainable operations with welfare standards
Support organisations working to improve wild European eel populations through habitat restoration
Advocate for restrictions on wild glass eel capture to protect the critically endangered wild stock
Encourage development of closed-cycle eel aquaculture that does not depend on wild capture