Red-tailed Butterflyfish

Overview

The Red-tailed Butterflyfish (Chaetodon collare) is a visually distinct marine fish recognized by its deep, compressed body and striking color pattern. It is widely distributed across the Indo-West Pacific, where it is commonly found inhabiting coral reefs and rocky slopes.

Distribution & Habitat

This species ranges from the Persian Gulf and the Maldives eastward to Japan, the Philippines, and Indonesia. Adults typically frequent reef edges and upper slopes, while juveniles are often found in more sheltered environments, including estuaries and brackish waters.

Appearance

The body of the Red-tailed Butterflyfish is generally dark brown to grey, with lighter-colored scale centers that create a spotted or reticulated appearance. Its head features a prominent vertical white stripe behind the eyes, a dark ocular band, and a smaller white stripe in front of the eyes. The species is named for its vibrant red caudal fin base, which is followed by a black stripe and a diffuse white margin at the tail tip.

Biology & Behavior

These fish are typically observed in pairs or small aggregations. They are known for their relatively bold nature compared to some other butterflyfish species. During the breeding process, they form monogamous pairs. While they are generally peaceful, they may exhibit territorial behavior toward other butterflyfish or similar-shaped species if space is limited.

Feeding

In the wild, the Red-tailed Butterflyfish is a specialized feeder that relies primarily on coral polyps. Its diet may also include small invertebrates and algae found within its reef habitat.