The Gem Tang, Gemmatum Tang, or Mauritian Tangfish (Zebrasoma Gemmatum), is a marine reef tang that lives at water depths of 33′ to 200′ feet, and is found in the Western Indian Ocean off the coast of Mozambique, South Africa and Madagascar and near the islands of Réunion and Mauritius.
The Gem Tang,Gemmatum Tang, or Mauritian Tangfish grows to a maximum length of 8.7″ inches. The Gem Tang or Mauritian Tangfish is a highly prized specimen by marine aquarists that can often sell for thousands of dollars.
