Farmed Eel Welfare: A Gap in Aquaculture Regulation

European and Japanese eels are farmed in intensive systems with significant welfare concerns, while wild eel populations face critical conservation threats from overexploitation and habitat loss.

Key Facts

European eel populations have declined by over 90% since the 1980s due to overfishing, habitat loss, parasites, and climate change, making them Critically Endangered
Japanese eel farming produces over 60,000 tonnes annually, primarily in China and Japan, using wild-caught glass eels as seed stock due to inability to breed eels in captivity
Eels in intensive aquaculture are maintained at extremely high densities in recirculating systems, causing chronic crowding stress and high disease pressure
Eel slaughter methods including live chilling, salt exposure, and cutting without prior stunning are likely to cause significant suffering in a species with well-developed nociceptive systems
The wild capture of juvenile glass eels for aquaculture seed stock depletes already severely depleted wild populations, creating a conservation-welfare conflict

Welfare Considerations

Farmed eel welfare involves multiple concerns spanning the production cycle. Wild glass eel capture for aquaculture seed stock contributes to population collapse of already critically depleted wild eel stocks, representing a conservation harm with individual welfare implications. In farming systems, extreme stocking densities cause chronic stress, skin damage, and elevated disease susceptibility requiring heavy chemical treatments. Slaughter practices for eels, which remain conscious and responsive even after decapitation due to their robust nervous system, are particularly concerning. The eel aquaculture sector operates largely outside meaningful welfare regulation in all major producing countries. The biological peculiarity of eels, which cannot be bred in captivity and must be sourced from wild populations, makes sustainable welfare-positive eel farming almost inherently contradictory.

What You Can Do

Reduce or eliminate eel consumption given both the critical conservation status of wild populations and welfare concerns in farming
Avoid unagi (eel) in sushi and Japanese cuisine unless explicitly sourced from certified sustainable recirculating aquaculture with welfare standards
Advocate for prohibition of wild glass eel capture for aquaculture given the critical conservation status of European and Japanese eel species
Support habitat restoration programs including removal of migration barriers and restoration of wetland eel habitat
Contact major Japanese restaurant chains and sushi suppliers to ask about their eel sourcing policy and plans to transition away from wild-caught seed stock