Also known as Broad-banded Cardinalfish, Rifle Cardinal.
Found singly or in small schools, sheltering during the day, dispersing at night to feed in shallow waters of lagoons, coastal reefs and in tide pools.
They feed on benthic crustaceans and zooplankton.
Length - 8cm
Depth - 0-50m
Widespread Northwest 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. Ref: https://www.fishbase.se/summary/Ostorhinchus-kiensis