European eel is critically endangered and farmed eel - primarily Japanese eel - involves significant welfare concerns at every stage of production. The eel farming industry presents one of aquaculture's most complex welfare challenges.
Farmed eel presents a dual welfare and conservation crisis. The welfare problems - extreme stocking density, inadequate water quality, inhumane slaughter - affect billions of eels globally, primarily Japanese and European species. The conservation problem is that all farmed eels begin as wild-caught juveniles, so every farmed eel represents a removed wild individual. No solution to the welfare crisis can ignore the conservation crisis. Until captive breeding is achieved, responsible eel consumption means accepting significant welfare and environmental costs, or choosing not to consume eel. This is a case where welfare and environmental ethics align toward reduction.