Where are butterflyfish found?

They are found mostly on reefs in the Atlantic, Indian, and Pacific Oceans.

How many species are there?

There are approximately 129 species in 12 genera.

How do butterflyfish differ from angelfish?

Butterflyfish resemble smaller angelfish but lack the preopercle spines on the gill covers.

Are bannerfish and coralfish butterflyfish?

Yes; bannerfish and coralfish are included in the butterflyfish group.

Do any butterflyfish resemble other species?

Some Heniochus species resemble the Moorish idol (Zanclus cornutus).

What higher-order group do butterflyfish belong to?

They belong to the order Acanthuriformes, which includes related families that share similar habitats.

Are there paired species between regions?

A number of species pairs occur in the Indian and Pacific Oceans.

Do butterflyfish live outside reefs?

The source specifies they are mostly found on reefs; presence elsewhere is not detailed here.

Saltwater Fishes

Butterfly Fish

Butterflyfish are conspicuous tropical reef fishes of the family Chaetodontidae found mainly in Atlantic, Indian, and Pacific oceans.

ButterflyfishBannerfishCoralfish

Last Updated Mar 9, 2026 · 4 sources

Photo byGerhard Venter

Species Guide

What to know about butterfly fish

A clean field guide focused on habitat, identification, behavior, and conservation context without burying the useful parts.

Butterflyfish are a group of tropical marine fishes in the family Chaetodontidae, comprising about 129 species in 12 genera. They are mostly found on reefs in the Atlantic, Indian, and Pacific Oceans. The group includes fishes commonly called bannerfish and coralfish. Butterflyfish superficially resemble smaller angelfish but lack preopercle spines on the gill covers. Some members of the genus Heniochus resemble the Moorish idol (Zanclus cornutus). Butterflyfish, angelfish, and the Moorish idol belong to related families within the order Acanthuriformes and occupy similar habitats.

The strongest linked planning options currently surface around destinations such as Phuket, Koh Tao, Mahé and countries such as Thailand, Egypt, Indonesia for divers building trips around butterfly fish.

Identification

How to identify butterfly fish

The visual markers divers can use underwater, plus the species most likely to cause confusion.

Key identification markers

General appearance

Conspicuous tropical reef fishes that can resemble smaller angelfish in shape and coloration.

Gill cover

Unlike angelfish, butterflyfish lack preopercle spines on the gill covers.

Similar genera

Some Heniochus species have a resemblance to the Moorish idol (Zanclus cornutus).

Common lookalikes

Angelfish (Pomacanthidae)

Butterflyfish look similar to smaller angelfish but can be distinguished by the absence of preopercle spines.

Moorish idol (Zanclus cornutus)

Certain Heniochus species resemble the Moorish idol in appearance.

Responsible Encounters

How to dive with butterfly fish

Conservation-minded guidance for divers who want the encounter without adding pressure.

Give butterfly fish space, avoid blocking the animal's path, and follow local site and operator rules for wildlife interactions with saltwater fishes.

Field Notes