The Naso Tang, also known as the Orangespine Unicornfish, darkens with maturity. Naso Tangs from Hawaii are often more brightly colored than those found in other areas. As a juvenile, the Naso Tang from Hawaii is dark gray with a blue stripe following along the dorsal fin and an orange stripe in the anal fin. When matured, the body takes on a reddish-brown tone and the juvenile striping is supplemented with additional color. The tail takes on a lyre shape with a yellow vertical bar towards the back. Two orange patches appear at the peduncle spines near the tail. The face undergoes the largest change. A thin, black mask forms between the eyes and mouth. The mask is outlined with bright yellow and the lips develop a reddish-orange color.
A 180 gallon or larger aquarium is necessary to provide plenty of swimming room, and places to hide, with a tight-fitting lid provided to prevent jumping to escape. It is aggressive towards other tangs, but peaceful with other fish in the tank.
Although Tangs will eat meaty foods along with the other fish in the aquarium, it is important that they are offered plenty of marine based seaweed and algae. This will strengthen their immune system, reduce aggression and improve their overall health. Offer dried seaweed tied to a rock or use a veggie clip, and feed at least 3 times per week.