Warm water of Palaos, a small archipelago in l' perhaps Pacific Ocean, hold the richest biological diversity and the majority of the coral reefs of planet. In this “cradle of diversity”, the marine biologists recorded 700 coral species and 1500 fish species. The coral reefs of Palaos started to develop d' million; years, when colonized coral polyps submerged of volcanic mountains. The tiny polyps produces a material which cemented them in place. Side by side, they built skeletons, hard external around their soft body, and when they died, the corals d' other skeletons built above d' them. Geologic forces finally raised the mountains of coral surmounted above by the sea, and all the talks the corals died. With time, new colonies built on slopes plus underwater reefs islands...