Blueline Surgeonfish Acanthurus nigroris

The Blueline Surgeonfish is native to reefs of the Pacific, mainly around Hawaii. It can grow to 25 cm long. (Its name is easy to confuse with the Blue-lined Surgeonfish, an alternative name for both the Striped Surgeonfish A. lineatus and for the Elongate Surgeonfish, A. mata. It also looks similar to A. nigros, the Greyhead, which used to be considered the same species.)