Gary Bell/ Oceanwide / Convict Surgeonfish (Acanthurus triostegus) school, Christmas Island, Australia

David Fleetham / Large school of Convict Surgeonfish / Tang (Acanthurus triostegus) on reef. Five images were digitally stitched to make this panorama. Yap, Micronesia.

Jordi Chias / Convict surgeonfish (Acanthurus triostegus) Gafu atoll, Indian Ocean, Maldives.

Jordi Chias / Convict surgeonfish (Acanthurus triostegus) Gafu atoll, Indian Ocean, Maldives.

Gary Bell/ Oceanwide / Convict Surgeonfish (Acanthurus triostegus) school, Christmas Island, Australia

David Fleetham / Convict tang (Acanthurus triostegus), feeding on filamentous algae, Rarotonga, Cook Islands.

David Fleetham / Convict surgeonfish (Acanthurus triostegus), sometimes referred to as the sub-species (Acanthurus sandvicensis) Hawaii.

GEORGETTE DOUWMA / School of Convict surgeonfish / Tangs {Acanthurus triostegus} Maldives

Willem Kolvoort / Convict surgeon fish (Acanthurus triostegus) in Passe Dubois / Dubois channel, Aldabra, Indian Ocean