Also known as Luminous Cardinalfish, Nose-spot Cardinalfish, Schooling Cardinalfish, Swallowtail Cardinalfish.
Found in large dense schools during the day, around caves, over patch reefs with coral heads and rocks for shelter, dispersing at night to feed.
They feed nocturnally midwater on plankton
Length - 6cm
Depth - 2-15m
Males incubate their eggs inside their mouths, as the egg masses increase in size they can be found with wide open mouths where they shift the eggs around to aerate the egg masses. Ref: https://www.fishbase.se/summary/5746