Tailspot Squirrelfish

Overview

The Tailspot Squirrelfish is a common, reef-associated species widely distributed throughout the tropical Indo-Pacific. It is a nocturnal predator that typically spends its daylight hours sheltering in crevices and caves before emerging to hunt at night.

Distribution & habitat

This species is found in the Indian and Pacific Oceans, ranging from East Africa to Japan, northern Australia, and the Marshall Islands. It favors outer reef slopes, drop-offs, and lagoons, where it is often observed near rocky substrates or coral rubble.

Appearance

This fish features a compressed, fusiform body that is primarily red with silver-edged scales. It is characterized by its large eyes, which are adapted for low-light hunting, and a distinctive silvery-white spot on the upper part of the caudal peduncle, though this mark may fade after death. The spinous portion of the dorsal fin is mottled light red with bright red outer membranes.

Biology & behavior

As a nocturnal hunter, the Tailspot Squirrelfish relies on its keen vision to navigate the reef in the dark. It can be found living either solitarily or in small groups. While generally peaceful toward non-territorial species, it can be territorial toward others of its own kind. Like other members of its family, it possesses sharp spines on its head and gill covers that serve as a defense mechanism.

Feeding

Its diet consists primarily of benthic invertebrates, with a strong preference for crabs and shrimps. It may also opportunistically consume small fish, mollusks, and worms found within the reef structure.