Yellow longnose butterflyfish

Care at a glance

Overview

Mostly peaceful and generally easy to feed once settled, taking mysis, krill, and other meaty frozen foods readily, though it can squabble with similar-looking butterflyfish and should be kept one per tank. Reef safety is mixed: many individuals leave corals alone and are kept successfully in reef tanks, but some will pick at soft coral polyps, tubeworm crowns, or the tube feet of sea urchins, so it earns a caution rating rather than a clean yes. Give it a full quarantine before adding it to a display, since it is more prone to parasitic infection during shipping stress than many other butterflyfish.

In the wild

Widespread across the Indo-Pacific and Red Sea from East Africa to Hawaii, and also found in the eastern Pacific from Baja California to the Galapagos, on clear lagoon and seaward reefs down to about 145 m. Its long snout is built for picking food out of narrow coral crevices and among the spines of sea urchins, so the aquarium should offer plenty of live rock with nooks and crevices to forage through along with open swimming space. A tank of at least 400 litres (106 US gal) suits a single fish.

Good to know

Named for its greatly elongated, forceps-like snout, an adaptation shared with its close relative Forcipiger longirostris and used to reach small invertebrates tucked deep in reef crevices that other butterflyfish cannot get at. Its body is bright lemon yellow with a black-and-white barred head and a false eyespot near the tail that helps confuse predators about which end is which. It reaches about 22 cm, making it one of the larger Chaetodontidae kept in home aquariums.

Common questions

Related species

• 

  Big longnose butterflyfish

  Forcipiger longirostris

  8.7 in (22 cm) · 100 gal (380 L)

  8.7 in (22 cm)100 gal (380 L)73–81°F (23–27°C)

• 

  Threadfin butterflyfish

  Chaetodon auriga

  9.1 in (23 cm) · 79 gal (300 L)

  9.1 in (23 cm)79 gal (300 L)75–81°F (24–27°C)

• 

  Raccoon butterflyfish

  Chaetodon lunula

  7.9 in (20 cm) · 106 gal (400 L)

  7.9 in (20 cm)106 gal (400 L)75–81°F (24–27°C)

• 

  Collare butterflyfish

  Chaetodon collare

  7.1 in (18 cm) · 90 gal (340 L)

  7.1 in (18 cm)90 gal (340 L)73–81°F (23–27°C)

• 

  Golden butterflyfish

  Chaetodon semilarvatus

  9.1 in (23 cm) · 151 gal (570 L)

  9.1 in (23 cm)151 gal (570 L)75–82°F (24–28°C)

• 

  Schooling bannerfish

  Heniochus diphreutes

  8.3 in (21 cm) · 124 gal (470 L)

  8.3 in (21 cm)124 gal (470 L)75–81°F (24–27°C)