Also known as Goldtail Damselfish, Yellowtail Blue Damsel, Yellowtail Blue Damselfish, Yellowtail Damselfish, Yellowtail Demoiselle, Yellow-tailed Damsel.
Found in pairs or small schools sheltering in the arms of Acropora corals over coral rich sheltered lagoons and fringing reefs rich in coral growth.
They feed on algae, benthic crustaceans and fish eggs.
Length - 6cm
Depth - 0-16m
Widespread Western 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. (edit) Ref: https://www.fishbase.se/summary/Chrysiptera-parasema.html