Lined Butterflyfish

Overview

The Lined Butterflyfish (Chaetodon lineolatus) is the largest member of the genus Chaetodon, reaching lengths of up to 30 cm. This widespread marine species is easily recognized by its distinct pattern and is commonly observed in tropical reef environments across the Indo-Pacific region.

Distribution & Habitat

This species has an extensive range spanning from the Red Sea and East Africa across the Indian and Pacific Oceans to Hawaii, southern Japan, and the Great Barrier Reef. They are typically found in lagoon and seaward reef environments, often inhabiting coral-rich areas at depths ranging from shallow waters down to approximately 170 meters.

Appearance

The body is white and laterally compressed, featuring a series of thin, vertical black lines along the sides. A prominent black band runs vertically across the eye, and a distinct black elliptical marking covers the posterior portion of the back, extending across the caudal peduncle. The dorsal, anal, and caudal fins are characterized by their bright yellow coloration.

Biology & Behavior

Lined Butterflyfish are generally non-migratory and are most frequently encountered in pairs. They are oviparous and maintain monogamous social bonds. While they are associated with coral reefs, they are not strictly dependent on live coral for their survival.

Feeding

Their diet is varied, consisting primarily of coral polyps and anemones. They also supplement their intake with small invertebrates and algae, often foraging for these discrete prey items on non-coral substrates.