The Red-tailed Butterflyfish or redtail butterflyfish (Chaetodon collare), also known as the Pakistani Butterflyfish, is a species of butterflyfish (familyChaetodontidae).

It can be found in reefs of the Indo-Pacific oceans: from the Persian Gulf and Maldives to Japan, the Philippines and Indonesia. It usually swims at depths of between 3 and 15 m.^[1]

It can grow to 18 cm (over 7 in) in length. The Red-tailed Butterflyfish is brown to black, with lighter scales giving it a spotted appearance. It has a prominent, vertical white streak behind the eyes, a dark stripe over the eyes, and another, smaller white stripe in front of the eyes. The base of the tail is bright red, followed by a black stripe. The tip of the tail is diffuse white.^[1]

In the wild, its diet consists of coral polyps. In captivity, it is a carnivore, taking fish meat and shrimp

Red-tailed Butterflyfish
Scientific classification
Kingdom: Animalia Phylum: Chordata Class: Actinopterygii Order: Perciformes Family: Chaetodontidae Genus: Chaetodon (but see text) Subgenus: Rabdophorus Species: C. (R.) collare
Binomial name
Chaetodon (Rabdophorus) collare Bloch, 1787