Bloch's Bigeye

Overview

Bloch's bigeye (Priacanthus blochii), also known as the paeony bulleye, is a marine ray-finned fish belonging to the family Priacanthidae. This species is widely distributed across the Indo-Pacific region and is recognized for its ability to rapidly alter its body coloration based on its mood.

Appearance

This fish features a laterally compressed, deep body that typically ranges from reddish-brown to a silvery hue. It can quickly shift its appearance, displaying diffuse blotchy bars or fading to a paler shade. A consistent identifying mark is a distinct red patch located beneath the eye. The caudal fin is generally rounded or truncate, and the pelvic fins often exhibit an indistinct black spot at their base.

Distribution & habitat

Bloch's bigeye is found throughout the Indo-Pacific, ranging from the Red Sea and the coast of southern Africa to Samoa, extending north to Japan and south to the Great Barrier Reef. It inhabits both lagoon and seaward reefs, often favoring silty environments. During the day, these fish are typically found sheltering in caves or under rocky ledges.

Biology & behavior

This species is primarily nocturnal, emerging from its daytime hiding spots to feed in open water. It is generally encountered as a solitary individual or in small groups. As a carnivore, its diet consists of small fish and zooplankton.