This World Bank paper outlines a best-case scenario whereby improved management of tuna fisheries allows Pacific Island countries to gain as much as US$344 million per year in additional sustainable revenues and create 7,500 to 15,000 jobs by 2040. The paper recommends five policy strategies: increased regional integration, efficient fishing practices and catch limits, flexible access and harvest rights for fleets, investment in skills and labor, and inclusion of coastal communities in fisheries planning. The paper builds on work undertaken by the Forum Fisheries Agency and the Pacific Community through the Regional Roadmap for Sustainable Pacific Fisheries, which was endorsed by Pacific Island Forum leaders in 2015. It is part of the World Bank’s Pacific Possible series, which explores potentially transformative opportunities for Pacific Island countries that warrant further research, understanding, and policy action. The paper's results are summarized in Pacific Possible: Long-Term Economic Opportunities and Challenges for Pacific Island Countries.