The Triangular Butterflyfish is a small Butterflyfish and makes a good addition to a community fish tank. With its grey colored body and dotted vertical yellowish bands, the Triangular Butterflyfish makes a gorgeous addition to any tank. The Triangular Butterflyfish prefers to live in pairs and grows up to 5 inches in length, therefore needs a large aquarium of 75 gallons. It thrives well in a temperature range of 75-82 degrees Fahrenheit. The juveniles Triangular Butterflyfish is often seen in groups among branching corals such as Acropora corals. The Triangular Butterflyfish is not a good choice for a beginner aquarist and is considered difficult to keep and feed. It is for advanced aquarists only. The Triangular Butterflyfish may nip over the corals as food and is considered unsafe to keep in reef tank.