Atlantic halibut aquaculture is a small, premium sector with welfare challenges related to their sensitive nature, cannibalism management, and the premium market pressure that can drive welfare-compromising practices.
Atlantic halibut welfare in aquaculture occupies an interesting position where premium pricing could either enable better welfare through investment or incentivize worse welfare through density and growth optimization. The welfare challenges are specific to the species: extreme size variation in cohorts drives cannibalism, requiring frequent size-grading operations that impose handling stress; their flatfish physiology means bottom substrate quality is more important than for pelagic species; their sensitivity to handling means that routine management operations cause stronger stress responses than in more robust species. The small scale of halibut aquaculture relative to salmon creates both an opportunity — welfare standards can be established without major industry disruption — and a risk — limited regulatory attention means welfare standards are often voluntarily adopted rather than required.