Biglip Damsel

Cheiloprion labiatus is a small reef fish belonging to the damselfish family Pomacentridae, distinguished by its notably thickened, fleshy lips, from which its common name derives. Typically pale yellow to cream in coloration, this species is closely associated with living thickets of Acropora coral, particularly staghorn formations, where it shelters among the branches and feeds primarily on coral polyps and associated invertebrates. Like many damselfishes, it tends to form small aggregations and plays a role in reef trophic dynamics both as a grazer and as prey for larger reef predators.

The species has a wide Indo-Pacific distribution, occurring in the marine neritic and coastal waters of Australia, Indonesia, the Philippines, Japan, Palau, New Caledonia, Vanuatu, Malaysia, Singapore, Christmas Island, and Bangladesh. Its presence is tightly linked to coral reef ecosystems, particularly areas with extensive branching Acropora growth.

Its principal threat is ongoing habitat shifting and alteration, driven largely by coral reef degradation. Because this species depends heavily on live branching coral for shelter and food, bleaching events, ocean warming, and reef structural decline directly reduce the amount of suitable habitat available, contributing to a decreasing population trend.

Conservation efforts specific to this species are limited, but it benefits indirectly from broader coral reef protection initiatives, marine protected areas, and international reef monitoring programs operating across its range countries. Reduction of local stressors such as pollution and destructive fishing practices in reef zones also supports habitat stability.

Given continued global coral reef decline and the species' strong ecological dependence on live coral habitat, its outlook remains concerning, with population trajectory closely tied to the future condition of Indo-Pacific reef systems.