Chelmon

Copperband butterfly fish

Copperband butterfly fish, Chelmon rostratus

The Copperband or Beaked butterfly fish is a popular species, but can be a finicky aquarium inhabitant. By nature, the Copperband butterfly feeds on coral polyps, its long slender mouth perfectly suited for this task. In aquariums, the Copperband butterfly is often introduced as a “natural” pest control solution for nuisance anemones such as Aiptasia spp. The dark spot near back half of the dorsal fin is believed to be a “false eyespot” which can fool would-be predators into thinking the fish’s eye is on the opposite end, giving the fish a chance of escape.