European catfish (wels) are farmed in pond and tank systems in Central and Eastern Europe, with welfare considerations around their nocturnal and solitary nature, crowding during harvest, and live transport practices.
Intensively stocked catfish in ponds experience chronic territorial stress and competitive exclusion of subordinate individuals from food. Crowding at pond draining during harvest causes extreme aggression and injury at high densities. Catfish transported live to markets are confined in conditions that prevent normal escape and avoidance responses. Slaughter by air suffocation or live evisceration is standard in much of the region. Electrical stunning before slaughter is more humane but inconsistently adopted in small-scale facilities.