Blue Marine Foundation aims to restore the ocean to health by addressing widescale destruction of life and habitats in the ocean. BLUE is dedicated to creating marine reserves, tackling overfishing, restoring vital habitats and developing models of sustainable fishing. BLUE’s mission is to see 30 per cent of the world’s ocean under effective protection by 2030 and the other 70 per cent managed in a responsible way. The ocean has undergone devastating change over the last century. Marine life is under threat from climate change, deoxygenation, acidification and many types of pollution, including noise and invasive species. But arguably the greatest threat is from overfishing. Industrial scale, destructive fishing practices have laid waste to marine life and habitats, altered coastlines and threatened the livelihoods and food supply of the billions of people who rely on fish as their main source of protein. The ocean produces more than half of the world’s oxygen, has stored around a third of our carbon dioxide and has absorbed more than 90 per cent of excess heat within the climate system, thanks to life within it. Overfishing is systematically undermining the ocean’s capacity to play this crucial role through habitat destruction, disturbance of the seabed and through the removal of marine animals. We have to act now to protect and restore our ocean to health if we are to stave off the worst effects of climate change and a global food crisis.