David Fleetham / Whitetip reef shark (Triaenodon obesus) resting on sea floor. Kauai, Hawaii.

Pascal Kobeh / White tip shark (Triaenodon obesus) laying on the sandy bottom, New Caledonia, Pacific Ocean.

Pascal Kobeh / Close-up of the head of a White tip shark (Triaenodon obesus) laying on the bottom with a Remora (Echeneis naucrates) on its head, Sulu sea, Philippines

Nick Hawkins / Whitetip reef shark (Triaenodon obesus) resting during daytime on sea floor. Near Cocos Island National Park, Costa Rica.

Nick Hawkins / Whitetip reef shark (Triaenodon obesus) resting during daytime on sea floor. Cocos Island National Park, Costa Rica.

Alex Mustard / Whitetip reef shark (Triaenodon obesus) beneath an overhang with Surgeonfish. Cousins Rock, San Salvador Island, Santiago Island, Galapagos National Park, Galapagos Islands. East Pacific Ocean.

David Fleetham / Whitetip reef shark (Triaenodon obesus) and Green sea turtle (Chelonia mydas) looking at one another in underwater cavern. Maui, Hawaii.

David Fleetham / Whitetip reef shark (Triaenodon obesus), motion blurred image. Hawaii.

David Fleetham / Whitetip reef shark (Triaenodon obesus) cruises over a sandy bottom off the island of Maui, Hawaii.

David Fleetham / Whitetip reef shark (Triaenodon obesus) cruises over a sandy bottom off the island of Maui, Hawaii.

Doug Perrine / Divers approach Whitetip reef shark (Triaenodon obesus) resting inside cavern, Gato Island, off Malapascua, Cebu, Philippines. Visayan Sea, Western Pacific Ocean.

Bert Willaert / Pregnant Whitetip reef shark (Triaenodon obesus) swimming above reef. Kimbe Bay, West New Britain, Papua New Guinea

Claudio Contreras / Mexican Hogfish (Bodianus diplotaenia) and Whitetip Reef Shark (Triaenodon obesus) resting, IUCN Near Threatened, Roca Partida Islet, Revillagigedo Archipelago Biosphere Reserve (Socorro Islands), Pac...

Claudio Contreras / Whitetip Reef Shark (Triaenodon obesus), IUCN Near Threatened, Roca Partida Islet, Revillagigedo Archipelago Biosphere Reserve (Socorro Islands), Pacific Ocean, Western Mexico, March

Claudio Contreras / Whitetip Reef Shark (Triaenodon obesus) resting on ground, IUCN Near Threatened, San Benedicto Island, Revillagigedo Archipelago Biosphere Reserve (Socorro Islands), Pacific Ocean, Western Mexico, Mar...

Claudio Contreras / Whitetip Reef Shark (Triaenodon obesus) resting, IUCN Near Threatened, Roca Partida Islet, Revillagigedo Archipelago Biosphere Reserve / Archipielago de Revillagigedo UNESCO Natural World Heritage Sit...

Claudio Contreras / Whitetip Reef Shark (Triaenodon obesus) resting, IUCN Near Threatened, Roca Partida Islet, Revillagigedo Archipelago Biosphere Reserve / Archipielago de Revillagigedo UNESCO Natural World Heritage Sit...

Claudio Contreras / Whitetip Reef Shark (Triaenodon obesus) resting, IUCN Near Threatened, Roca Partida Islet, Revillagigedo Archipelago Biosphere Reserve / Archipielago de Revillagigedo UNESCO Natural World Heritage Sit...

Claudio Contreras / Whitetip Reef Shark (Triaenodon obesus) resting, IUCN Near Threatened, Roca Partida Islet, Revillagigedo Archipelago Biosphere Reserve / Archipielago de Revillagigedo UNESCO Natural World Heritage Sit...

Claudio Contreras / Whitetip Reef Shark (Triaenodon obesus) group resting, IUCN Near Threatened, Roca Partida Islet, Revillagigedo Archipelago Biosphere Reserve / Archipielago de Revillagigedo UNESCO Natural World Herita...

Claudio Contreras / Whitetip Reef Shark (Triaenodon obesus) resting, IUCN Near Threatened, Roca Partida Islet, Revillagigedo Archipelago Biosphere Reserve / Archipielago de Revillagigedo UNESCO Natural World Heritage Sit...

Doug Perrine / Whitetip reef shark (Triaenodon obesus) upper and lower teeth on display at Oceanographic Museum of Monaco, Principality of Monaco (digitally modified)

Franco Banfi / Panamic green moray (Gymnothorax castaneus) and Whitetip reef sharks (Triaenodon obesus) Roca Partida close to San Benedicto Island, Revillagigedo Archipelago Biosphere Reserve, Socorro Islands, Weste...

Franco Banfi / Whitetip reef sharks (Triaenodon obesus) group resting in coral reef, Roca Partida close to San Benedicto island, Revillagigedo Archipelago Biosphere Reserve, Socorro Islands, Western Mexico

Franco Banfi / Whitetip reef sharks (Triaenodon obesus) group resting in coral reef, Roca Partida close to San Benedicto island, Revillagigedo Archipelago Biosphere Reserve, Socorro Islands, Western Mexico

Franco Banfi / Whitetip reef sharks (Triaenodon obesus) resting on sea floor, Roca Partida close to San Benedicto island, Revillagigedo Archipelago Biosphere Reserve, Socorro Islands, Western Mexico

Franco Banfi / Whitetip reef sharks (Triaenodon obesus) resting on sea floor, Roca Partida close to San Benedicto island, Revillagigedo Archipelago Biosphere Reserve, Socorro Islands, Western Mexico

Franco Banfi / Whitetip reef sharks (Triaenodon obesus) resting on the sea floor, Roca Partida close to San Benedicto Island, Revillagigedo Archipelago Biosphere Reserve, Socorro Islands, Western Mexico

Jordi Chias / Whitetip reef sharks (Triaenodon obesus) resting on sea floor, Roca Partida, Socorro Islands. Mexico, Pacific Ocean

Franco Banfi / Whitetip reef shark (Triaenodon obesus) resting on the bottom, Cocos Island National Park, Costa Rica, East Pacific Ocean

Franco Banfi / Whitetip reef shark (Triaenodon obesus) portrait, Cocos Island National Park, Costa Rica, East Pacific Ocean

Franco Banfi / Whitetip reef sharks (Triaenodon obesus) resting on the bottom, Cocos Island National Park, Costa Rica, East Pacific Ocean

Franco Banfi / Whitetip reef shark (Triaenodon obesus) and shoal of Whipper snappers (Lutjanus jordani) Cocos Island National Park, Costa Rica, East Pacific Ocean

Franco Banfi / Scuba diver and Whitetip reef shark (Triaenodon obesus) Cocos Island National Park, Natural World Heritage Site, Costa Rica, East Pacific Ocean. September 2012.

Franco Banfi / Whitetip reef shark (Triaenodon obesus) Cocos Island National Park, Costa Rica, East Pacific Ocean

Franco Banfi / Whitetip reef shark (Triaenodon obesus) Cocos Island National Park, Costa Rica, East Pacific Ocean

Franco Banfi / Whitetip reef shark (Triaenodon obesus) resting, Cocos Island National Park, Natural World Heritage Site, Costa Rica, East Pacific Ocean

Franco Banfi / Whitetip reef sharks (Triaenodon obesus) two resting, Cocos Island National Park, Costa Rica, East Pacific Ocean

Franco Banfi / Whitetip reef shark (Triaenodon obesus) resting close to Marbled ray (Taeniura meyeni) Cocos Island National Park, Natural World Heritage Site, Costa Rica, East Pacific Ocean

Franco Banfi / Whitetip reef shark (Triaenodon obesus) resting close to Marbled ray (Taeniura meyeni) Cocos Island National Park, Costa Rica, East Pacific Ocean

Franco Banfi / Whitetip reef shark (Triaenodon obesus) portrait, Cocos Island National Park, Natural World Heritage Site, Costa Rica, East Pacific Ocean

Franco Banfi / Whitetip reef shark (Triaenodon obesus) Cocos Island National Park, Costa Rica, East Pacific Ocean

Pete Oxford / White-tipped reef sShark (Triaenodon obesus) on sea floor, Galapagos.

Pascal Kobeh / Two White tip sharks (Triaenodon obesus) resting on sea floor, Cocos island, Costa Rica. Pacific ocean.

Pascal Kobeh / White tip shark (Triaenodon obesus) resting on sea floor, Cocos island, Costa Rica. Pacific ocean.

Pascal Kobeh / White tip shark (Triaenodon obesus) swimming near the coral reef drop off among a school of Blue-and-gold snappers (Lutjanus viridis), Cocos island, Costa Rica. Pacific ocean.

Pascal Kobeh / Two White tip sharks (Triaenodon obesus) resting on sea floor, Cocos island, Costa Rica. Pacific ocean.

Pascal Kobeh / White tip shark (Triaenodon obesus) resting on sea floor with a remora (Echeneis naucrates) attached to its back, Maldives. Indian Ocean.

Pascal Kobeh / Blackspotted stingray (Taeniura meyeni) swimming near reef with a White tip shark (Triaenodon obesus) resting on sea floor in the background, Cocos island, Costa Rica. Pacific ocean.

Pascal Kobeh / White tip sharks (Triaenodon obesus) circling excitedly whilst hunting for prey, Cocos island, Costa Rica. Pacific ocean.

Pascal Kobeh / Group of White tip sharks (Triaenodon obesus) resting on sea floor with a Trumpetfish (Aulostomus chinensis) on top of them, Revillagigedo islands, Mexico. Pacific Ocean.

Pascal Kobeh / Group of White tip sharks (Triaenodon obesus) resting on sea floor, Revillagigedo islands, Mexico. Pacific Ocean.

Pascal Kobeh / Group of White tip sharks (Triaenodon obesus) resting on sea floor, Revillagigedo islands, Mexico. Pacific Ocean.

Pascal Kobeh / Group of White tip sharks (Triaenodon obesus) resting on sea floor, Revillagigedo islands, Mexico. Pacific Ocean.

Pascal Kobeh / Group of White tip sharks (Triaenodon obesus) resting on sea floor, Revillagigedo islands, Mexico. Pacific Ocean.

Pascal Kobeh / White tip shark (Triaenodon obesus) swimming in open water, Revillagigedo islands, Mexico. Pacific Ocean.

Pascal Kobeh / Napoleonfish / Maori wrasse (Cheilinus undulatus) and Whitetip reef shark (Triaenodon obesus) on bottom of the reef, Palau. Philippine Sea.

Pascal Kobeh / Hunting 'pack' of White tip sharks (Triaenodon obesus) at night, Cocos island, Costa Rica. Pacific ocean.

Michele Westmorland / Sleeping white-tip reef sharks (Triaenodon obesus) Galapagos Islands.

Michele Westmorland / White-tip reef sharks (Triaenodon obesus) and school of Black Striped Salema (Xenocys jessiae) Galapagos Islands.

Michele Westmorland / White-tip reef sharks (Triaenodon obesus) and school of Black Striped Salema (Xenocys jessiae) Galapagos Islands.

Michele Westmorland / White-tip reef sharks (Triaenodon obesus) and school of Black Striped Salema (Xenocys jessiae) Galapagos Islands.

David Fleetham / Whitetip reef shark (Triaenodon obesus) resting on seabed under rock. Hawaii, Pacific Ocean.

Shane Gross / Whitetip reef shark (Triaenodon obesus) leaving a coral cavern as another hides within, Tubuai, French Polynesia, Pacific Ocean.

Alex Mustard / Six Whitetip reef sharks (Triaenodon obesus) resting together on a ledge, Revillagigedo Islands, Mexico, Pacific Ocean.

Alex Mustard / Three Whitetip reef sharks (Triaenodon obesus) swimming along a rocky dropoff with a Bluefin trevally (Caranx melampygus) swimming behind, Roca Partida, Revillagigedo Islands, Mexico, Pacific Ocean.

Alex Mustard / Whitetip reef shark (Triaenodon obesus) resting on rocky ledge, Revillagigedo Islands, Mexico, Pacific Ocean.

Alex Mustard / Two Whitetip reef sharks (Triaenodon obesus) swimming over a rocky dropoff, Revillagigedo Islands, Mexico, Pacific Ocean.

Tui De Roy / Whitetip reef sharks (Triaenodon obesus) resting in lava tube cave, El Finado, Isabela Island, Galapagos Islands, Ecuador. Pacific Ocean.

Tui De Roy / Whitetip reef sharks (Triaenodon obesus) swimming in shallows, Canal Itabaca, Santa Cruz Island, Galapagos Islands, Ecuador. Pacific Ocean.

Tui De Roy / Whitetip reef shark (Triaenodon obesus) resting in lava tube cave, El Finado, Isabela Island, Galapagos Islands, Ecuador. Pacific Ocean.

Tui De Roy / Whitetip reef shark (Triaenodon obesus) swimming in shallows, El Finado, Isabela Island, Galapagos Islands, Ecuador. Pacific Ocean.

Tui De Roy / Whitetip reef shark (Triaenodon obesus) swimming in shallows with snorkeller in background, El Finado, Isabela Island, Galapagos Islands, Ecuador. Pacific Ocean.

Tui De Roy / Whitetip reef shark (Triaenodon obesus) and shoals of fish swimming in shallows, Canal Itabaca, Santa Cruz Island, Galapagos Islands, Ecuador. Pacific Ocean.

Tui De Roy / Whitetip reef sharks (Triaenodon obesus) sheltering in mangrove inlet, Venecia, Sanata Cruz Island, Galapagos Islands, Ecuador. Pacific Ocean.

David Fleetham / Whitetip reef shark (Triaenodon obesus) with fishing hook caught in its mouth, and parasite. Hawaii, Pacific Ocean.

Alex Mustard / Group of Whitetip reef sharks (Triaenodon obesus) resting on a ledge, Revillagigedo Islands, Mexico, Pacific Ocean.

Alex Mustard / Whitetip reef shark (Triaenodon obesus) cruising over a school of Blue and gold snappers (Lutjanus viridis) in a cavern, San Benedicto Island, Revillagigedo Islands, Mexico, Pacific Ocean.

Doug Perrine / Whitetip reef shark (Triaenodon obesus), being cleaned by endemic Hawaiian cleaner wrasse, (Labroides phthirophagus) while resting in undersea cavern, Touch of Gray dive site, North Kona, Hawaii, Paci...

David Fleetham / Three Whitetip reef shark (Triaenodon obesus) resting on the seabed in shallow water, Hawaii, Pacific Ocean.

David Fleetham / Shoulderbar soldierfish (Myripristis kuntee) and Whitetip reef shark (Triaenodon obesus) sharing space in a crevice during the day, Hawaii, Pacific Ocean.

Noemie Stroh / Whitetip reef sharks (Triaenodon obesus) swimming along a reef, Roca Partida, Revillagigedo Islands, Mexico, December.

David Fleetham / Whitetip reef shark (Triaenodon obesus) resting in rock crevice on reef, one of a few sharks that can remain motionless for short periods, Pacific Ocean, Hawaii, USA.

David Fleetham / Whitetip reef sharks (Triaenodon obesus) Yap, Federated States of Micronesia

David Fleetham / Whitetip reef sharks (Triaenodon obesus) on coral reef, Hawaii.

Noemie Stroh / Two Whitetip reef sharks (Triaenodon obesus) swimming, with school of fish nearby, Cocos Islands, Costa Rica.

Noemie Stroh / Whitetip reef shark (Triaenodon obesus) swimming, with school of fish nearby, Cocos Islands, Costa Rica.

Pascal Kobeh / Group of White tip sharks (Triaenodon obesus) lying on the bottom, Revillagigedo islands, Mexico. Pacific Ocean.

Pascal Kobeh / Group of white tip sharks (Triaenodon obesus) lying on the bottom, Revillagigedo islands, Mexico. Pacific Ocean.