Farmed eels are produced in intensive recirculating systems but rely on wild-caught juveniles, creating conservation and welfare concerns throughout the supply chain.
Farmed eel production presents an unusual combination of conservation and welfare concerns. On the conservation side, the reliance on wild glass eel collection from critically endangered populations means that every farmed eel represents an individual removed from an already-depleted wild stock. On the welfare side, high-density RAS rearing conditions cause chronic stress, and the industry standard of ice bath killing without prior stunning subjects conscious, pain-sensitive animals to a prolonged and distressing death. The conservation case for closing European eel farming entirely — at least until captive breeding is achieved — aligns with the welfare case for rejecting products from an industry with fundamentally poor welfare standards.