Pharaoh Cardinalfish

Found hiding in caves, crevices, and in seagrass beds, of silt reefs, dispersing at night foraging for food, in mangroves and seagrass beds.
They feed nocturnally on zooplankton.

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.