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