Also know as Kupang Cardinal.
Found singly, pairs or small schools during the day sheltering in silty waters close to rocky areas, dispersing at night to feed over coral and rocky reefs.
They feed nocturnally on zooplankton
Length - 7cm
Depth - 0-22m
Widespread Western Central Pacific
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. (edit) Ref: https://www.fishbase.se/summary/59184