Convict Tang Acanthurus triostegus

The Convict Tang or Surgeonfish is native to tropical reefs of the Indo-Pacific region with a wide distribution from East Africa via Japan/Australasia to the American coast. A schooling fish, there are a number of variations in colour (extent of any yellow) and pattern (shape and continuity of stripes, especially around pectoral and caudal fins.) over its vast range.

Its "convict" name is in reference to its black-striped white pattern. It is sometimes called the Black-barred Surgeonfish. It can reach 27cm long.