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Butterflyfish
Butterflyfish are a common sight among reefs and a coveted addition to the home aquarium. However, many can be quite sensitive and they are known for not feeding in captivity. We have a few that are more successful than others, but this family overall is considered to be delicate. While most butterflies are typically marketed as eating aptasia (a small pest anemone), we find this to be a hit-or-miss based on the individual. Even so, they are a gorgeous family of fish and are enchanting to watch flit between the rock.
Not every tank can support a butterfly of any type. Most of these are medium- or large-sized fish that need a lot of room for swimming and a lot of rock for hiding. Many are very skittish for some time after being introduced, and even the most social ones need some security. For some species, there is also a risk of them eating certain corals and/or shrimps.
Compatibility with other butterflies and similarly shaped fish varies widely amongst species. Most butterflies should not be kept with other butterflies, with a few exceptions.
Copperband Butterfly
Minimum Tank Size:
Copperbands are one of the most popular butterflies available, and easily the most recognizable. Like most fish, there's a dramatic range of personality for individuals, though most are moderately shy and exceedingly peaceful.
Longnose Butterfly
Minimum Tank Size:
Longnoses are the second most popular butterfly for their vibrant yellow bodies and distinctive snouts. Unlike most butterflies, they are good at standing their ground against bullies.
Paul Asman and Jill Lenoble, CC BY 2.0
Klein's Butterfly
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A new addition to our roster, Kleins' are surprisingly hardy and social. They are willing to hold their own at feeding time, but aren't aggressive to their tankmates.
fir0002 flagstaffotos, GFDL 1.2
Black and White Henio
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Black and White Henios are our most common butterfly. They are normally kept alone, but it is sometimes possible to establish a small group in large tanks. They become very social once settled, but can sometimes become aggressive with smaller or similarly-shaped fish.
Silberflossenblatt, CC BY-SA 3.0
Argentus Mono
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While not actually a butterfly (and not even a true saltwater fish), Monos are very similar in behavior and appearance, but with much easier care. They can be kept in small groups in large tanks, but most are better alone. They are very active fish and should not be kept with anything too nervous.