Electrical stunning is one of the most promising methods for humanely rendering fish insensible before slaughter. Understanding the evidence helps consumers and producers make better welfare choices.
When correctly applied, electrical stunning renders fish insensible within milliseconds, providing a near-instant transition to unconsciousness. This dramatically reduces suffering compared to asphyxiation in air or ice slurry. The challenge is that parameters must be species-specific and carefully controlled — too little current causes pain without unconsciousness; too much damages flesh quality. Research continues to develop reliable protocols across species. For species where protocols are established, electrical stunning represents a genuine welfare improvement.