Copperband butterflyfish
A long-snouted reef fish with yellow stripes
The copperband butterflyfish is a reef-dwelling species found in the Indian and Pacific Oceans. It features a distinctive long snout and vertical yellow bands on a white body. This fish lives in pairs on coral reefs and rocky shores, often entering estuaries. It is popular in home aquariums for controlling pest anemones but requires expert care to survive.
- Grows up to 20 cm in length
- Found in Indian and Pacific Ocean reefs
- Eats pest anemones and tube worms
- Forms monogamous breeding pairs
- Requires large tanks with live rock
What it is
This fish has a deep, compressed body that makes it appear taller than it is long. Its most striking features are the vertical yellow stripes set against a white background and a very long, slender snout. A dark band runs across the base of the tail. The eye is dark but less obvious than a false eye-spot on the dorsal fin. Adults and young look similar. It grows up to twenty centimetres in length.
Where it lives
These fish inhabit the coral reefs and rocky shorelines of the Indian and Pacific Oceans. They are also found in silty inner reefs and estuaries, indicating a tolerance for brackish conditions. They typically live at depths between one and twenty-five metres. The species is territorial within its chosen habitat.
How it lives
Copperband butterflyfish are usually seen alone or in monogamous pairs. They graze on live rock and hunt for invertebrates. Their diet includes tube worms, substrate worms, clams, and mollusks. They also eat parasitic forms like tubeworms and certain anemones. Although they consume pests, glass anemones are their least preferred food source when other options exist.
Breeding and life cycle
The species forms monogamous pairs during the breeding season. They are oviparous, meaning they reproduce by laying eggs. Specific details on spawning times or egg development are not provided in the available information.
Fish and people
Aquarists keep this fish to help manage pest populations in reef tanks. It eats unwanted organisms such as glass anemones and tubeworms. However, it is not suitable for beginners because it needs excellent water conditions to survive. A tank of at least seventy-five gallons with plenty of live rock is required. Many owners introduce them for short-term pest control without planning for their long-term survival needs.
Questions people ask about Copperband butterflyfish
What does the copperband butterflyfish eat?
It feeds on invertebrates including tube worms, substrate worms, clams, and mollusks. It also consumes parasitic anemones, though glass anemones are its least favoured option when other foods are available.
Is this fish suitable for beginner aquarists?
No, it is not recommended for inexperienced keepers. The species requires excellent tank conditions, a minimum volume of seventy-five gallons, and ample live rock to thrive or even survive in captivity.
How large do these fish grow?
In the wild, they can reach a maximum length of twenty centimetres. In home aquariums, they are typically observed at about half that size due to space constraints and environmental factors.
Good reading and sources
- Copperband butterflyfish on WikipediaEncyclopedia
- More photos on Wikimedia CommonsPhotos
- Wikidata recordOpen data
The facts on this page come from the Wikipedia article "Copperband butterflyfish", written by its contributors and used under the CC BY-SA 4.0 licence, and from its Wikidata record (CC0). EveryFish rewrote the text in its own words, with AI assistance, and compares every page with the article to make sure no passage is copied. It may be reused under the same CC BY-SA 4.0 licence with a link back.
It may contain mistakes, and figures change over time. Nothing here is investment or buying advice. If something is wrong, tell us. Last refreshed 2026-11-15.
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