Breathtaking, powerful, and all-encompassing in its sheer scope and visual impact, Ocean sweeps you away on an incredible journeyinto the depths of our astonishing marine world. As the site where life first formed on Earth, a key element of the climate, and a fragile resource, oceans areof vital importance to our planet. This is a definitive visual guide to the world's oceans - including the geological and physical processes that affectthe ocean floor, the key habitat zones, the rich diversity of marine life.