European eel face a conservation crisis driven by overfishing and habitat loss, while the aquaculture industry and welfare considerations create complex management challenges.
European eel welfare exists at the intersection of an acute conservation crisis and commercial farming interests that depend on wild-caught juveniles. Every glass eel captured for aquaculture is one that cannot contribute to the critically low spawning population. This creates a welfare consideration at the population level that overlaps with but differs from individual animal welfare: farmed eels may be kept in reasonable welfare conditions while the farming itself contributes to population-level suffering through reduced reproductive output. Individual eel welfare in aquaculture requires attention to water quality, stocking density, and slaughter methods for a species with poorly studied pain responses and complex physiological needs.