This publication explores marine renewable energy sources from floating solar farms to deep ocean turbines and shows how increasing the capacity of the blue economy can help the Asia and Pacific region transition to a clean energy, low carbon future. Providing an overview of ADB's Marine Aquaculture, Reefs, Renewable Energy, and Ecotourism for Ecosystem Services (MARES) project, it examines stressors impacting the region's oceans and examines the benefits of multifunctional approaches. It considers emerging ocean entrepreneurship and shows how adopting a holistic blue economy vision can produce a regenerative marine environment, support coastal communities, and help meet climate goals.