The Greenblotch Parrotfish, Sparisoma atomarium is primarily an algae eater as opposed to the other types of parrotfish, which are primarily coral eaters.  This type of parrotfish does not get very large only around 5 inches in length which makes them great for aquariums.  They also enjoy pellet foods, and other meaty foods if you do not have an algae problem. 

The ones that we sell are around 2 to 2.5 inches in length since they get harder to determine types once they get their adult colorations.