Longnose Butterflyfish

Physical Characteristics

The Longnose Butterflyfish has a bright yellow body with a distinctive elongated snout. Its dorsal and anal fins are also yellow. There is a black tear-drop shaped spot at the base of the caudal (tail) fin. The eyes are often covered by a dark band. The elongated snout is adapted for feeding in crevices.

Habitat & Distribution

Longnose Butterflyfish are commonly found in coral reefs and rocky areas of the Indo-Pacific region. They inhabit lagoons, channels, and outer reef slopes at depths ranging from 1 to 100 meters (3 to 328 feet). They are often observed individually or in pairs.

Size & Weight

Typical size ranges from 15 to 22 cm (6 to 9 inches) in length. Maximum recorded size is around 22 cm (9 inches). Weight information is not commonly specified for this species, but it is a relatively lightweight fish for its size.

Similar Looking Species

The Forceps Butterflyfish (Forcipiger longirostris) is a very similar species. The key distinguishing feature is the length of the snout: Forcipiger longirostris has a noticeably longer snout compared to Forcipiger flavissimus. Forcipiger longirostris often also has a few small black spots on the chest area, which are typically absent in Forcipiger flavissimus.

Ecological Role

This fish plays a role in coral reef ecosystems by primarily feeding on small invertebrates found within corals and rocks. They are zooplanktivores and sometimes feed on coral polyps themselves, which can impact coral health depending on their population density. As a prey species, they are part of the marine food web.

Identified on: 8/14/2025

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