Farmed Eel Welfare and Aquaculture Practices

Welfare challenges in eel aquaculture, including the reliance on wild-caught juveniles, stocking density issues, and the complex needs of this migratory species.

Key Facts

European eel is critically endangered — wild populations have declined by over 90% since the 1980s
Eel aquaculture depends entirely on wild-caught glass eels because eel reproduction in captivity has not been achieved
High stocking densities in eel farms cause significant stress, aggression, and injury
Eels are highly sensitive to water quality and show stress responses to handling and environmental change
The Japanese eel industry faces similar challenges, with aquaculture dependent on wild juvenile harvest

Welfare Considerations

Eel aquaculture sits at an uncomfortable intersection of welfare and conservation concerns. The welfare problems — overcrowding, handling stress, and the physiological demands on a highly adapted migratory species held in static tanks — are significant. The conservation problem is that commercial eel farming maintains demand for a critically endangered species while depending on wild-caught juveniles that further deplete wild populations. There is no clean resolution: improved welfare requires lower stocking densities and better conditions, while conservation requires reduced wild glass eel harvest. Authentic sustainability requires addressing both simultaneously.

What You Can Do

Avoid consuming eel products given the critical conservation status of both European and Japanese eel species
Support campaigns for stronger protection of wild eel populations and their migration routes
Advocate for stricter regulation of glass eel harvesting that is depleting already critically endangered populations
Engage with retailers and restaurants about removing eel from menus until sustainable aquaculture is achievable
Donate to eel conservation organisations working on population recovery and sustainable management research