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.

It can reach 27cm long. Its "convict" name is in reference to its black-striped white pattern. It is sometimes called the Black-barred Surgeonfish, but that is usually the name of the related Zebra Tang, A. polyzona, with closer black barring.

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.