Copperband Butterflyfish

The Copperband Butterflyfish, *Chelmon rostratus*, is a striking and elegant addition to the marine aquarium, instantly recognizable by its elongated snout and bold vertical bands of copper and white against a silver body. A prominent black spot on the dorsal fin resembles an eye, potentially deterring predators.

A minimum tank size of 70 gallons is recommended to provide ample swimming space and a stable environment. This species is known for its peaceful temperament but can be sensitive to water quality and stress. A well-established aquarium with live rock is essential, as the Copperband Butterflyfish will spend much of its time actively searching for food within the rockwork.

While generally considered reef-safe with caution, the Copperband Butterflyfish is a natural predator of small invertebrates and may occasionally nip at sessile invertebrates, including some corals and clam mantles, particularly if not adequately fed. They are highly effective at controlling nuisance pests such as Aiptasia anemones and bristle worms, making them a popular choice for hobbyists struggling with these issues.

Feeding the Copperband Butterflyfish can sometimes be challenging, as they can be finicky eaters. A varied diet is crucial and should include a mix of high-quality frozen foods such as mysis shrimp, brine shrimp, and finely chopped seafood. Offering live foods like blackworms or small crustaceans can also help entice them to eat. They will also graze on algae and small invertebrates found on live rock.

In the home aquarium, the Copperband Butterflyfish typically reaches a size of around 6-8 inches. There are no readily apparent visual differences between males and females. Breeding in captivity is extremely difficult and rarely achieved.