Common carp and related species are the most produced fish in global aquaculture, yet they receive almost no welfare attention despite evidence of sentience and significant production-related stress.
Common carp may represent the largest single welfare challenge in global food production: over 30 million tonnes of sentient animals produced annually with essentially no welfare regulation or attention. The production conditions — extreme stocking densities, inadequate water quality management, and poor pre-slaughter handling — create chronic welfare deficits at a scale that dwarfs most other animal agriculture sectors. Carp production receives minimal welfare attention because it occurs primarily in China and other Asian markets outside the purview of Western welfare regulation, involves fish (which receive less moral consideration than mammals), and uses traditional production methods that are economically important to rural communities. The welfare science argues for urgent attention: carp demonstrate the behavioral and physiological indicators of sentience that justify welfare concern.