Revolutionary natural-light filter photography is combined with a marine biologist's expert understanding of reef life, in Alex Mustard's visual manifesto of a world at the sharpest edge of climate change. The world's coral reefs may disappear within the century, warned the landmark Intergovernmental Panel on Climate Change report. Through his award-winning photography Mustard seeks to change perceptions and show why we cannot afford to lose these invaluable treasures. They support the most diverse marine communities and beautiful seascapes, and their health is an indicator of the health and future of our planet. Perpetually surprising, Mustard's photographs derive from coral reefs from all around the world, including the Red Sea, Indian Ocean, Pacific, Southeast Asia and Caribbean. They include images from newly discovered reefs off Southern Birds Head Peninsula in West Papua, found by scientists to support the most diverse reef fish communities in the world, as well as a previously unknown species of 'walking shark'.