QUICK STATS Minimum Tank Size: 180 gallons Care Level: Moderate Temperament: Semi-aggressive Reef Compatible: Yes Water Conditions: 72-78° F, dKH 8-12, pH 8.1-8.4, sg 1.020-1.025 Max. Size: 1' 6" Color Form: Black, Blue Diet: Herbivore Compatibility: View Chart Origin: Maldives Family: Acanthuridae The Blonde Naso Tang, also known as the Orange-spine Unicornfish, darkens with maturity. As a juvenile, it is gray with a yellow stripe on both the dorsal and anal fin. When matured, the body takes on a darker bluish-gray tone and the juvenile striping is supplemented with additional color. The tail takes on a lyre shape and two yellow patches appear at the peduncle spines near the tail. A thin, black mask forms between the eyes and mouth, and the lips develop a yellow color. Naso Tangs from Hawaii are often more brightly colored than those found in other areas.