High Quality Content by WIKIPEDIA articles! The Ocean Surgeonfish, Acanthurus bahianus, is a tropical fish known to live in reefs in the Atlantic Ocean. Ocean Surgeonfish are known by their oval bodies with uniform color (Usually blue-gray to dark brown), the pale to dark marking around the eyes, and the light yellow found on their pectoral fins. Most have blue or white markings on the dorsal fin, anal fin, and tail fins and pale bands can sometimes be seen at the base of their tails. They often swim in schools with other species such as the Atlantic blue tang surgeonfish. They have been recorded up to 38 cm in length (15 in).