The European eel is Critically Endangered and its dependence on wild-caught glass eels for aquaculture creates a direct conflict between farming economics and wild population recovery.
European eel conservation and aquaculture are in direct conflict. The aquaculture industry for this species is entirely dependent on harvesting wild juveniles from a population that is already Critically Endangered — making European eel farming inherently unsustainable from both conservation and long-term welfare perspectives. Farming European eel simultaneously harms individual farmed animals (see eel aquaculture welfare concerns) and depletes the wild population that it depends upon. The welfare equation includes not just individual farmed eels but the billions of wild eels affected by population collapse and the cascading ecosystem effects of losing a keystone species from European freshwater and coastal systems. There is no sustainable or welfare-compatible version of European eel aquaculture as currently practiced. The most welfare-positive consumer choice is to avoid European eel products entirely until closed-cycle reproduction is achieved — something that remains a research goal rather than a commercial reality.