Three quarters of the planet is ocean and 80 per cent of all life lives here. They give us so much, yet we know relatively little about them. Planet Ocean is a window onto this secret world. Through stunning photographs, taken on a sixteen-month 'Defending Our Oceans' expedition, Greenpeace reveals images few people have seen, capturing both the beauty and desperate state of our oceans, and the people that rely on them. Despite the vastness of the oceans we now know that they are in crisis, struggling to absorb the impact of our destructive ways. This is the story of our oceans - their extraordinary beauty and diversity of life - and the equally astounding ways in which they are exploited. Photographs are the work of a team of world-class photographers assigned to the expedition: Christian Aslund, Daniel Beltra, Marco Care, Nick Cobbing, Kate Davison, Pierre Gleizes, Roger Grace, Alex Hofford, Lester V. Ledesma, Steve Morgan, Gavin Newman, Danny Ocampo, Todd Warshaw, and Jeremy Sutton-Hibbert.