Third-party welfare certification schemes are emerging as a key tool for improving aquaculture standards. Understanding what these schemes require, how they are verified, and where gaps remain helps consumers and producers make more welfare-positive choices.
Aquaculture welfare certification is advancing but remains fragmented and inconsistently applied. The most rigorous schemes require evidence-based welfare indicators — such as mortality rates, fin damage scores, and behavioural assessments — rather than relying solely on input-based criteria like stocking density limits. Verification quality varies enormously: some schemes use rigorous third-party audits with unannounced inspections, while others rely on producer self-reporting. A major gap is the absence of welfare standards for the majority of farmed species, including most shrimp, shellfish, and freshwater fish. Slaughter welfare is a particular weakness — even certified farms may not require electrical or percussive stunning before killing. NGOs including the Fish Welfare Initiative and Aquatic Life Institute are working to close these gaps by developing science-based welfare standards.