National Geographic photographer David Doubilet explores the glittering world hidden beneath the waves of Papua New Guinea's Kimbe Bay. After shooting a photo assignment there 17 years ago, he was eager to return. Hear about the challenges David Doubilet faced in the field: www.youtube.com/watch?v=o2fNUos_Emw See more of his photos from this assignment: ngm.nationalgeographic.com/2013/11/kimbe-bay/doubilet-photography