Cetoscarus bicolor The color of the Bicolor Parrotfish changes with maturity. As a juvenile, the coloration is white with an orange band across the face, and orange at the dorsal and caudal fins. The mature fish has a blue body with a spotted face and additional colors at the fins. These fish grow quite large! As juveniles, 55 gallon aquarium is sufficient. Eventually, they will need 125-180 gallons minimum. They do best in a system with live rock for them to pick off of.