Common carp are the world's most widely farmed fish and a major recreational fishing species. Their welfare in both contexts deserves attention given their demonstrated sensory capacities.
Common carp welfare spans both aquaculture production at enormous scale and recreational fishing with generally better welfare practices than other fishing cultures. European carp angling has developed sophisticated welfare practices including unhooking mats, antiseptic treatment of hook wounds, and rapid return to water that reflect genuine welfare consideration for the fish. Farmed carp welfare is less developed — intensive pond culture often involves high stocking densities, poor water quality management, and handling practices that cause significant stress. The evidence for carp pain experience, while less conclusive than for mammals, is sufficient to justify precautionary welfare practices in both recreational and commercial contexts. Improving farmed carp welfare standards would have enormous scale impact given production volumes.