Also known as Monarch Damselfish.
Found singly or in pairs, around live coral thickets, interspersed with open sand and dead corals over lagoon reefs.
They feed on filamentous algae and benthic invertebrates.
Length - 18cm
Depth - 1-5m
Widespread Western Central Pacific
Damselfish are egg layers.
First they clear a site ready for a nest, then engage in a mating dance with rapid swimming and fin movements, during this time the males will often turn a shade or two darker and may display white blotches. Spawning occurs at dawn. Ref: https://www.fishbase.de/summary/8242