From LiveAquaria:

Quick Stats
Care Level Moderate
Temperament Semi-aggressive
Color Form Tan, Yellow
Diet Herbivore
Reef Compatible Yes
Water Conditions 72-78° F, dKH 8-12, pH 8.1-8.4, sg 1.020-1.025
Max. Size 1' / 30 cm
Origin Fiji, Indonesia
Family Acanthuridae
Minimum Tank Size 125 gallons / 480L

Overview
The Scopas Tang, also known as the Brown Scopas Tang is yellow, dorsally, and brown, ventrally. These colors gradually get darker from front to back. The body is covered with fine, intricate, light blue markings. The tail is a solid brown color. Juveniles are a little more attractive, with larger dorsal and anal fins and a slightly purplish body color.
A 125 gallon or larger aquarium is necessary to provide plenty of swimming room. It is aggressive towards its own species or tangs in general, and best kept with only one per 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. Sea Veggies, Seaweed Salad and Ocean Nutrition are all ideal products and are very easy to use.

Articole:

https://www.advancedaquarist.com/2002/11/fish

https://www.practicalfishkeeping.co.uk/features/articles/the-scopas-tang-mistaken-identity