Achilles Surgeonfish schooling and grazing on algae on coral reef

Achilles Surgeonfish, aka Achilles Tang, has a striking black body with orange-red and white accents. They often travel and feed in schools, and grazes on algae throughout the day. Surgeonfish have a blade like spine in the tail that points outwards when bent and is used for defense, and is as sharp as a surgeons scalpel, hence the name 'Surgeonfish'.
 
The coral reef is a very fragile part of the ocean, and many creatures are needed to help keep it healthy and in balance. Large schools of surgeonfish are needed to maintain this balance.
 
Scientific Name: Acanthurus achilles