Tang Surgeon Fish
These popular algae eaters are known by a few names. Tang, Surgeon Fish, Doctorfish, Unicornfish. They do tend to take meaty commercial food quite easily. But it is also recommended that you supplement their diet with marine based seaweed and algae. Which is important to their immune system. They will graze on algae growing in your tank. But like most fish if easier food is available they may not bother.