School of Grey reef sharks (Carcharhinus amblyrhynchos) at the surface of the water off the island of Yap; Yap, Micronesia PacificStock
French Polynesia, Rangiroa, Blue Lagoon, Blacktip Reef Shark (Carcharhinus Melanopterus). PacificStock
This male green sea turtle (Chelonia mydas), an endangered species, is being followed closely by a spotted unicorn fish (Naso brevirostris); Hawaii, United States of America PacificStock