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...

Richard Robinson / Bluehead sandtilefish (Hoplolatilus starcki) Yagasa Lagoon, Lau Island Group, Fiji.

Alex Mustard / Bluehead wrasse (Thalassoma bifasciatum) during a spawning rise. East End, Grand Cayman, Cayman Islands, British West Indies. Caribbean Sea.

Pete Oxford / Bluehead (Thalassoma bifasciatum) Bonaire, Netherlands Antilles, Caribbean

Joel Sartore / Photo Ark / Two Bluehead chubs (Nocomis leptocephalus) portrait, Marion Conservation Aquaculture Center. These individuals are from the Little River, Yadkin-PeeDee River system, North Carolina, USA. Captive.

Joel Sartore / Photo Ark / Two Bluehead chubs (Nocomis leptocephalus) head portrait, Marion Conservation Aquaculture Center. These individuals are from the Little River, Yadkin-PeeDee River system, North Carolina, USA. Captive....

Joel Sartore / Photo Ark / Two Bluehead chubs (Nocomis leptocephalus) portrait, Marion Conservation Aquaculture Center. These individuals are from the Little River, Yadkin-PeeDee River system, North Carolina, USA. Captive.

David Hall / Bluehead wrasse (Thalassoma bifasciatum) school engaged in group spawning, simultaneously releasing eggs and sperm into the water column. This group consists of females and 'initial phase' m...

Claudio Contreras / Bluehead wrasse (Thalassoma bifasciatum) juvenile, Banco Chinchorro Biosphere Reserve, Caribbean region, Mexico, May

Claudio Contreras / Bluehead Wrasse (Thalassoma bifasciatum) juvenile cleaning Smooth Trunkfish (Lactophrys triqueter), Banco Chinchorro Biosphere Reserve, Caribbean region, Mexico, May

Alex Mustard / Planted colony of Staghorn coral (Acropora cervicornis) growing on a frame on a coral reef with bluehead (blue-headed wrasse: Thalassoma bifasciatum) and diver (Sam Lungari). Dive site: Playing Field....