In this report, the Mission Board on Healthy Oceans, Seas, Coastal and Inland Waters proposes a Mission Starfish 2030: Restore our Ocean and Waters by 2030. Inspired by the shape of the starfish, the Mission has five overarching objectives for 2030: (i) Filling the knowledge and emotional gap, (ii) regenerating marine and freshwater ecosystems, (iii) zero pollution, (iv) decarbonising our ocean, and waters (v) revamping governance. These five objectives are mutually supportive and taken together, the Mission Starfish 2030 will enable the restoration of the water cycle as a whole. For each of the five objectives, a set of ambitious, concrete and measurable targets has been defined. They specifically address the actors, activities, tools and systems that all need to be called upon to reach each objective. These targets are considered the indispensable components of a holistic approach to systemic change.