Acanthurus blochii

Acanthurus blochii, commonly known as the ringtail surgeonfish, is a large surgeonfish which needs plenty of swimming space and clean water to thrive. It usually lives in small groups so but can be aggressive towards other fish, especially other tangs and food competitors. It mainly feeds on algae growing on sand, and probably needs the sand for it's digestion.

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