Also known as Black-edged Damselfish, Blackmargin Damsel, Black-margined Damselfish.
Found in caves, around rocky outcrops, and along walls, in sandy areas of outer reef slopes, rich in coral growth.
They feed on filamentous algae and zooplankton.
Length - 8cm
Depth - 20-50m
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. Ref: https://www.fishbase.se/summary/6621