Chaetodon dialeucos also known as the Oman Butterflyfish is to be found endemic in the western Indian Ocean along the coast of Oman. The maximum total length is about 18 cm. Inhabits rocky and coral reefs. Feeds on worms, and other invertebrates; forms pairs.
Butterflyfish are not recommended for reefs as they will pick at or eat a wide variety of corals, fan worms, and other invertebrates. Most Butterflyfish are known to pick at Aiptaisia, a parasitic anemone.