Lagoon Damsel

Hemiglyphidodon plagiometopon

The Lagoon Damsel, also referred to as the sweetlip damsel, is a larger damselfish species prevalent in the Indo-Pacific. Adults typically exhibit a brown coloration with a lighter russet hue near the head, darkening towards the tail, and have pinkish marks on the gill cover. Juveniles are distinguishable by their dark blue to brownish head and body, which transitions to yellow towards the tail, and feature a prominent blue eyespot on the dorsal fin along with blue bands and spots near the head. They can grow to a length of up to 18 centimeters. This species is commonly found in sheltered reef environments and lagoons, often in areas with silty substrates near branching corals. They inhabit depths from 1 to 20 meters. As detritivores, Lagoon Damsels primarily consume fine detritus, supported by their numerous gill rakers, but they also ingest small amounts of algae and invertebrates. During breeding, they pair up to prepare a nesting site. The males perform a courtship display, and post-spawning, they protect and aerate the eggs until they hatch. Divers may encounter Lagoon Damsels in lagoon and coastal reef areas where they are often seen defending their territory. They are active during the day, making them easier to observe. The species is classified as Least Concern by the IUCN, although it faces potential threats from habitat changes and human activities.