Alex Mustard / Yellowtail tang (Zebrasoma xanthurum) male and female turn belly to belly during spawning to ensure fertilization. Temple, Ras Umm Sid, Sharm El Sheikh, Sinai, Egypt. Red Sea. This action is very fast...

Alex Mustard / Yellowtail tang (Zebrasoma xanthurum) male courting a female prior to spawning at dusk on a coral reef. Temple, Ras Umm Sid, Sharm El Sheikh, Sinai, Egypt. Red Sea.

Jeff Rotman / Orangespine unicornfish (Naso lituratus) profile portrait, Red Sea, Egypt.

Doug Perrine / Green sea turtle (Chelonia mydas) being cleaned of algae by Yellow tangs / surgeonfish (Zebrasoma flavescens), Puako, Kona, Hawaii, USA, June, Endangered species

Georgette Douwma / Brown tang (Zebrasoma scopas). North Sulawesi, Indonesia.

David Fleetham / Eyestripe surgeonfish (Acanthurus dussumieri) and Bigscale soldierfish (Myripristis berndti) school. Hawaii.

David Fleetham / Orangespine unicornfish (Naso lituratus), female amongst Bigscale soldierfish (Myripristis berndti) school, Hawaii.

David Fleetham / Green sea turtle (Chelonia mydas) with shell cleaned by a school of Goldring surgeonfish (Ctenochaetus strigosus) off Maui, Hawaii.

Alex Mustard / Blue tang (Acanthurus coeruleus) with Bluehead (Thalassoma bifasciatum) juveniles at cleaning station on coral reef. George Town, Grand Cayman, Cayman Islands, British West Indies. Caribbean Sea. Digi...

Linda Pitkin / Blue tang (Acanthurus coeruleus) and Doctorfish (Acanthurus chirurgus), in foraging aggregation. Bonaire, Leeward Antilles, Caribbean.

Linda Pitkin / Scrawled filefish (Aluterus scriptus) shadowed by Trumpetfish (Aulostomus maculatus). Blue Tang (Acanthurus coeruleus) also in this mixed fish species feeding association. Bonaire, Leeward Antilles,...