Atlantic cod aquaculture faces significant welfare challenges as a species adapted to wide-ranging, predatory behavior in open ocean environments is raised in intensive contained systems.
Farmed cod welfare illustrates the challenges of adapting a species evolved for open-ocean predatory life to intensive aquaculture systems. The behavioral and physiological traits that made cod successful ocean predators — activity levels, prey-seeking drives, social tolerance — do not translate well to contained high-density production systems. Welfare problems including aggression, cannibalism, and chronic stress from confinement are partly structural consequences of the species-system mismatch. Welfare-positive cod farming would require stocking densities and environmental complexity closer to the species' ecological requirements than intensive salmon production manages — potentially limiting commercial viability. The ongoing question for cod aquaculture is whether welfare-positive production at commercial scale is achievable.