European eels are Critically Endangered in the wild but farmed in large quantities, creating a conservation-welfare paradox where farmed eel demand may reduce wild eel population recovery.
European eel aquaculture presents a complex welfare and conservation challenge. The absence of captive breeding means all farmed eels begin as wild-caught juveniles, removing fish from a critically endangered population. In intensive RAS, high stocking densities and lack of natural burrowing substrate create chronic stress. Eels are escape-prone and show strong movement drives frustrated by captive conditions. Welfare in eel farming is poorly regulated compared to salmonid species. The fundamental conservation question — whether continued eel farming is compatible with wild population recovery — must be integrated with welfare assessment of captive conditions.