European eel farming raises dual concerns about wild stock conservation and the welfare of farmed animals during intensive aquaculture production.
European eel aquaculture creates a troubling intersection of conservation and welfare harms. The industry depends on removing wild-caught juvenile eels from a critically endangered population — each glass eel used in farming is one fewer that might reach adulthood and spawn. Once in captivity, eels face high-density conditions that cause chronic stress, and at slaughter they are often subjected to prolonged suffering from ice slurry or salt bath methods. The case for dramatically reducing eel consumption is strong on both conservation and welfare grounds, while the industry works toward closed-cycle breeding that would eliminate the wild-capture dependency.