Humpbacked Cardinalfish

There are over 200 species of Cardinalfish in the family Apogonidae, the majority of which are included in the genus Apogon.

The Humpbacked Cardinalfish Apogon hyalosoma is a species of estuarine habitats, particularly mangrove. At low tide small shoals may be spotted congregating in quiet, shady pools.

Its body shape is robust and rhomboid, with large scales on the flanks. Its forehead is slightly concave and its mouth and eyes are large.

There are two dorsal fins of roughly equal size. The tail and other fins are mainly white to translucent, except for the leading edge of the first dorsal fin which is dark red to blackish. At the based of its tail is a distinctive large, black spot.

This is a predatory species which feeds on a variety of small prey items.

This species is widely distributed in coastal waters of most countries in Southeast Asia except, perhaps, Burma. It also occurs widely in the western Pacific Ocean, including the coast of Papua New Guinea.