Zebrasoma scopas

Zebrasoma scopas, commonly known as the brown tang, is a very variable surgeonfish, closely related to Z. flavescens, which loves to graze algae. It incorporates shades of gray, brown, yellow and white. Some are all yellow and some are all black and mixed colors are also seen. Usually they get more beautiful the older they get. They're rarely aggressive towards other fish, but can be towards other other tangs and food competitors. Once hierarchy is established it usually poses no problems. 

Like other tangs, it will eat meaty foods, but it's important it can graze on algae/seaweed the entire day to ensure it will stay healthy. So feed flakes/pellets multiple times a day and make sure there is always seaweed available.