John Collins takes us on a marine adventure within the oceans that lap many of our most populated shores, from the North Atlantic around Western Europe, to the chilly Pacific of North America and south to the Great White sharks of Africa. His photographic portrait of a little-explored part of our ocean world, the cold seas between the tropics and the poles, encompasses a twenty-year career of diving. From his voyages he brings us 120 photographs illustrating the colorful and bizarre life below while also conveying the mood of exploration, including a time-capsule of our losses at sea-evoked by the somber mood of a lost ship.