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.