The Scopas Tang can reach up to 12 inches in length and requires an aquarium of at least 120 gallons with live rock and plenty of room to swim. They need rocks to graze on as their diet is primarily marine algae. For tanks on the smaller side that have less live rock to grow algae, you will need to supplement your tang’s diet with Nori or other vegetable matter like Nori, Romaine lettuce, spinach leaves, or broccoli. Scopas Tangs can be very aggressive to other tangs of the Zebrasoma genus, but are usually peaceful with fishes and non-Zebrasoma tangs after they establish their place in the pecking order of the tank. With the spines built into their tails, they are usually at the top of that pecking order. Keeping your Scopas Tang well-fed will reduce aggression in your reef. If you intend to keep fish, a netted lid is recommended.