Gem Tangs are one of the most exotic fish for marine aquariums and fetch a price worthy of that distention. They are found in the Western Indian Ocean at deep water making them difficult to collect and expensive to ship to the US. Like most other tangs, Gems can be aggressive, so it is a good idea not to risk housing them with other tangs of the genus Zebrasoma or those with similar body shape.
To keep them healthy, feed plenty of marine seaweed and algae.