Swarthy Parrotfish

Overview

The Swarthy Parrotfish (Scarus niger) is a widespread Indo-Pacific species recognized by its distinct color phases that shift as the fish matures. Like other members of the parrotfish family, it possesses a characteristic beak-like structure formed by fused teeth, which it uses to graze on the reef.

Distribution & habitat

This species is found throughout the tropical Indo-West and Central Pacific, ranging from the Red Sea and South Africa to Japan, Australia, and French Polynesia. It typically inhabits clear lagoons, channels, and outer reef slopes, often frequenting coral-rich environments.

Appearance

Coloration varies significantly by life stage. Juveniles are dark brown with a series of small white spots and a pair of black spots on the base of the tail. Adults exhibit more complex patterns; males are generally reddish-brown anteriorly and greenish posteriorly, often featuring a bright green or yellow spot behind the eye and dark bands around the mouth. Females may display a red head and belly with wavy black and white stripes along the body.

Biology & behavior

These fish are generally solitary, though males may maintain small harems of females. Juveniles are sometimes observed in small groups in shallower, inshore areas. As a hermaphroditic species, individuals can change sex to fulfill social roles within their group. They are primarily herbivorous, feeding on benthic algae found on coral reefs.