:  The Moorish Idol Home  >  Library  >   Fish Taxonomy   >  Moorish Idol Back Taxonomy: Perciformes, Moorish Idol  (Zanclidae) General Information: The moorish idol is the only member of this group. It has a protrusive mouth, a long and thin arched dorsal fin, and recognizable colors. Diet: It grazes on algae and sponges. Final Note: The moorish idol is a difficult fish in the home aquarium. Many different foods must be offered, including live shrimp, frozen mysid shrimp, and vegetable matter. Algae on live rock should also be available. Examples at SeaScape Studio: Moorish Idol Back