Longnose butterflyfish
The longnose butterflyfish, also called the forceps fish, is a butterflyfish in the family Chaetodontidae, widely distributed across the Indo-Pacific. It frequents reef slopes and drop-offs. It is bright yellow with a white face, a black eye bar, and a small dark spot near the tail, and has a distinctive long tubular snout used to pick prey from crevices. Its elongated mouth is its defining feature. It is one of the hardiest and most reef-tolerant butterflyfish, generally peaceful and adaptable to captivity. It can be kept singly or as a compatible pair in a large aquarium with live rock. It uses its snout to feed on small crustaceans and tube worms and readily accepts mysis, brine, and prepared foods. Reef-cautious but often kept with corals; suited to intermediate keepers.
Water parameters
| Temperature | 23 – 27 °C |
|---|---|
| pH | 8.1 – 8.4 |
| Carbonate hardness (KH) | 8 – 12 °dKH |
| Salinity | 33 – 35 SG |
Tank & stocking
| Minimum tank volume | 280 L |
|---|---|
| Volume budget per individual | 120 L — territorial: does not simply add up |
“Minimum tank volume” is a reasonable floor, not an absolute limit. The per-individual budget is used by the Aqua app to estimate how heavily a tank is stocked.
Frequently asked questions
What size aquarium does Longnose butterflyfish need?
Provide at least 280 litres to keep Longnose butterflyfish in good conditions.
What water parameters does Longnose butterflyfish need?
A temperature of 23–27 °C, pH 8.1–8.4, saltwater.
Is Longnose butterflyfish peaceful or aggressive?
Its temperament is peaceful.
What does Longnose butterflyfish eat?
Its diet: carnivore.
How big does Longnose butterflyfish get?
Around 22 cm as an adult.
Is Longnose butterflyfish suitable for beginners?
Care level: intermediate.
Planning a tank with Longnose butterflyfish?
AquaTender turns these parameters into live advice: it checks whether your tank is big enough, how heavily it's stocked, and whether your fish are compatible — then tracks water tests, photos and maintenance for you.
Fish from the same biotope
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