Ian Coleman / Illustration of Grey reef shark (Carcharhinus amblyrhynchos), Carcharhinidae. Endangered / threatened species.

Juergen Freund / Richard Fitzpatrick releases Grey reef shark {Carcharhinus amblyrhynchos} after inserting transmitter into its belly, as part of the Coral Reef census, Lizard Island, Queensland, Australia, April 2008

Juergen Freund / Grey reef sharks (Carcharhinus amblyrhynchos) at North Horn, Queensland, Australia

Juergen Freund / Grey Reef sharks (Carcharhinus amblyrhynchos) at North Horn teeming at water surface

Doug Perrine / School of Grey reef sharks {Carcharhinus amblyrhynchos}, Micronesia.

Doug Perrine / School of Grey reef sharks {Carcharhinus amblyrhynchos} on coral reef Micronesia.

Doug Perrine / School of Grey reef sharks {Carcharhinus amblyrhynchos} Micronesia.

Doug Perrine / School of Grey reef sharks {Carcharhinus amblyrhynchos} near surface Micronesia.

Fred Bavendam / Grey Reef Shark (Carcharhinus amblyrhynchos) feeding on a large baitfish ball, Solomon Islands, South Pacific

Fred Bavendam / Grey Reef Shark (Carcharhinus amblyrhynchos) feeding on a large baitfish ball, Solomon Islands

Doug Perrine / Grey reef shark group {Carcharhinus amblyrhynchos} Bikini Atoll, Micronesia, Pacific Ocean (Non-ex).

Juergen Freund / Grey reef shark dead on seabed after removal of fins {Carcharhinus amblyrhynchos} Philippines