Claudio Contreras / Bull shark (Carcharhinus leucas) Playa del Carmen, Caribbean Sea, Mexico, January.

Doug Perrine / Female Bull sharks (Carcharhinus leucas) in seasonal breeding aggregation with Sharksuckers (Echeneis naucrates) Playa del Carmen, Cancun, Quintana Roo, Yucatan Peninsula, Mexico (Caribbean Sea)

Flip Nicklin / Bull Shark (Carcharhinus leucas), North America

Jeff Rotman / Zambesi / Bull shark {Carcharhinus leucas} with Remora fish Natal, South Africa

David Fleetham / Diver feeding a Bull Shark (Carcharhinus leucas). Bequ Lagoon, Fiji. Model released.

Franco Banfi / Bull shark (Carcharhinus leucas), swimming over sandy seabed, South Bimini, Bahamas. The Bahamas National Shark Sanctuary, West Atlantic Ocean.

Franco Banfi / Bull shark (Carcharhinus leucas) feeding with scuba divers, Santa Lucia, Camaguey, Cuba, Caribbean Sea, Atlantic Ocean. November 2007.

Franco Banfi / Bull shark (Carcharhinus leucas) feeding, Santa Lucia, Camaguey, Cuba, Caribbean Sea, Atlantic Ocean

Franco Banfi / Bull shark (Carcharhinus leucas) Santa Lucia, Camaguey, Cuba, Caribbean Sea, Atlantic Ocean

Claudio Contreras / Bull shark (Carcharhinus leucas) Playa del Carmen, Caribbean Sea, Mexico, January.

Claudio Contreras / Bull shark (Carcharhinus leucas) swimming over sea floor, Playa del Carmen, Caribbean Sea, Mexico, January

Pete Oxford / Bull sharks (Carcharhinus leucas) in Beqa (Benga) Lagoon, a reserve where sharks are fed as part of a commercial diving operation. Viti Levu, Fiji, South Pacific.