Global Tuna Alliance is rated 3 out of 5 in the category fishery. Read and write reviews about Global Tuna Alliance. The Global Tuna Alliance is an independent group of retailers and tuna supply chain companies, who are committed to realising harvest strategies for tuna fisheries, avoidance of IUU products, improved traceability as well as environmental sustainability, and progressing work on human rights in tuna fisheries and to implementing the objectives laid out in World Economic Forum’s Tuna 2020 Traceability Declaration as championed by Friends of Ocean Action.