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

Jeff Rotman / Whitetip reef sharks (Triaenodon obesus) pack silhouetted following scent trail in water column, Cocos Island, Costa Rica, Pacific Ocean

Juergen Freund / Whitetip reef shark (Triaenodon obesus) at reef, West New Britain, Papua New Guinea.

Jeff Rotman / Whitetip Reef sharks (Triaenodon obesus) following scent trail in water column, Cocos Island, Costa Rica, Pacific Ocean.

Jeff Rotman / Whitetip Reef Sharks (Triaenodon obesus) following scent trail in water column, Cocos Island, Costa Rica, Pacific Ocean.

Juergen Freund / Whitetip reef shark (Triaenodon obesus) and Grey reef sharks (Carcharhinus amblyrhynchos) at North Horn, Queensland, Australia

Pete Oxford / Whitetip reef sharks {Triaenodon obesus} in shallows near shore, Bartolome Is, Galapagos

Jeff Rotman / Whitetip reef shark "Adéle" close-up of head {Triaenodon obesus} Cocos Island, Costa Rica, Pacific Ocean

Jeff Rotman / Whitetip reef shark pack hunting at night {Triaenodon obesus} Cocos Is, Costa Rica, Pacific Ocean

Jeff Rotman / Whitetip reef sharks hunt Surgeonfish over coral at night {Triaenodon obesus} Cocos Is, Pacific Ocean

Jeff Rotman / Whitetip reef shark {Triaenodon obesus} feeding on Surgeonfish at night. Cocos Is, Pacific Oceqn off Costa Rica

Jeff Rotman / Eye of Whitetip reef shark {Triaendodon obesus} Red Sea, Egypt

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

Gary Bell/ Oceanwide / White-tip Reef Shark (Triaenodon obesus), Heron Island, Great Barrier Reef, Queensland, Australia

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.

David Fleetham / Schooling Raccoon Butterflyfish (Chaetodon lunula) and a Whitetip Reef Shark (Triaenodon obesus). Lanai, Hawaii. Several images were digitally combined to create this panorama.

David Fleetham / Diver and resting Whitetip reef shark (Triaenodon obesus) Tubbataha Reef, Philippines. Model released.

David Fleetham / Whitetip reef shark (Triaenodon obesus) on seabed. Hawaii.

David Fleetham / Whitetip reef shark (Triaenodon obesus) resting, Hawaii.

David Fleetham / Grey reef shark (Carcharhinus amblyrhynchos) and Whitetip reef shark (Triaenodon obesus) off Mana Island, Fiji.

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

Norbert Wu / White-tip Reef Shark (Triaenodon obesus) group, Revillagigedo Islands, Mexico

Alex Mustard / Rich reef scene, showing marine life thriving in a cavern on a coral reef, with large sponges and Black coral (Antipathes sp.), Sixbar grouper (Cephalopholis sexaculata) and Whitetip soldierfish (Myri...

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...

Pete Oxford / White-tip Reef Shark (Triaenodon obesus), Rabida Island, Galapagos Islands, Ecuador

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 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 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 (Taeniurops 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 (Taeniurops 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.

Pete Oxford / White-tip Reef Shark (Triaenodon obesus) and snorkeler, Galapagos Islands, Ecuador

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.

Pete Oxford / White-tip Reef Shark (Triaenodon obesus) swimming over reef, Beqa Lagoon, Viti Levu, Fiji

Fred Bavendam / White-tip Reef Shark (Triaenodon obesus) pair on bottom below Blue-and-gold Snapper (Lutjanus viridis) school, Cocos Island, Costa Rica

Fred Bavendam / White-tip Reef Shark (Triaenodon obesus), Queensland, Australia

Fred Bavendam / White-tip Reef Shark (Triaenodon obesus), Queensland, Australia

Fred Bavendam / White-tip Reef Shark (Triaenodon obesus), Queensland, Australia

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.

Michael Pitts / Reef whitetip shark (Triaenodon obesus) pup hiding in the reef. Maldives

Franco Banfi / Whitetip reef sharks, (Triaenodon obesus) San Benedicto, Revillagigedo (Socorro) Islands, Mexico, East Pacific Ocean

Franco Banfi / Whitetip reef sharks (Triaenodon obesus) San Benedicto, Revillagigedo / Socorro Islands, Mexico, East Pacific Ocean

Juergen Freund / Whitetip reef shark (Triaenodon obesus) and Grey reef sharks (Carcharhinus amblyrhynchos) Great Barrier Reef, Coral Sea, Queensland, Australia

Juergen Freund / Whitetip reef shark (Triaenodon obesus) and Grey reef sharks (Carcharhinus amblyrhynchos) Great Barrier Reef, Queensland, Australia

Franco Banfi / Scuba diver watches Whitetip reef shark (Triaenodon obesus) over reef, Maldives, Indian Ocean