Atlantic halibut are among the larger flatfish farmed commercially, and humane slaughter presents unique logistical and welfare challenges.
Halibut welfare at slaughter is particularly important because of their size, value, and sensitivity. Unlike smaller fish that may be processed rapidly at scale, halibut require individual handling and slaughter, which can be done humanely or poorly depending on the system. Fish that are conscious during killing experience the full pain response, and the long time to unconsciousness using non-stunning methods means prolonged suffering. Best practice involves minimizing pre-harvest crowding, using effective percussion or electrical stunning before any invasive procedure, and immediately spiking the brain to destroy consciousness. Welfare improvements in halibut slaughter require investment but are achievable and increasingly expected by premium market buyers.