Copperband Butterflyfish, Chelmon rostratus

The Copperband Butterflyfish (Chelmon rostratus), also known as the Beaked Coral Fish, are found in reefs in both the Pacific and the Indian Ocean. This butterflyfish is one of the three species that make up the genus Chelmon and they all have long beaks.

These fish can easily be identified by the yellow banding and long snout. The younger fish are similar in appearance to adult fish. The butterflyfish grow up to 20 centimeters in length. The fish appears taller than its length due to it being a compressed and deep-bodied form with long dorsal and posterior fins as well as its vertical yellow stripes on a white colored background. The snout is slender and long, and the dark eye of the fish is not as conspicuous as the dark eye-spot on the dorsal fin. The base of the tail has a dark band that runs perpendicular to the tail.

These fish are found at depths of 1 to 15 meters either alone or in pairs. These fish create monogamous pairs during breeding. They are normally found on the coral reefs or rocky shorelines, and also in estuaries and silty inner reefs. This species is oviparous and territorial.

Image Caption: Copperband butterflyfish in aquarium-Muséum Liège (Belgium). Credit: LucViatour/Wikipedia (CC BY-SA 3.0)