Leopard Blenny

Overview

The Leopard Blenny (Exallias brevis) is a distinctive, solitary fish widely distributed across the tropical Indo-Pacific. It is the only member of its genus and is easily recognized by its blunt head and intricate, spotted body pattern that provides excellent camouflage against coral surfaces.

Distribution & habitat

This species is found throughout the Indo-Pacific, ranging from the Red Sea and South Africa eastward to the Hawaiian, Marquesan, and Society Islands, and from southern Japan down to Australia and New Caledonia. It typically inhabits clear coastal reefs, bays, and semi-exposed areas, often resting motionless among branching corals such as Acropora, Pocillopora, and Porites.

Appearance

Reaching up to 15 cm in length, the Leopard Blenny has a deep, laterally compressed body. Its coloration is generally white to pinkish, covered in a dense network of dark brown to black spots that may transition to red or orange on the rear of the body in males. The head is blunt with a convex profile, and the upper lip features numerous small papillae. Both sexes possess branched tentacles above their eyes and a series of nuchal cirri on the nape.

Feeding

Unlike many other blennies that graze on algae, this species is a specialized corallivore. It uses comb-like teeth on its jaws to scrape superficial tissue from living stony corals. This feeding activity often leaves behind small, circular white scars on the coral surface, which can sometimes be mistaken for localized bleaching or disease.

Reproduction

Leopard blennies exhibit distinct pairing behavior. Males are known to prepare nesting sites by aggressively overgrazing a patch of coral. They deposit demersal, adhesive eggs onto the substrate, which are secured by a filamentous pad.