Velvetchins or barbeled grunters are members of the Hapalogenyidae family. The Hapalogenyidae family is yet to be recognized. Some text suggested the genus to be placed under the Dinopercidae family. The Hapalogenys genus was formerly placed under the Haemulidae family or more commonly known as the grunts family.
The species of the genus Hapalogenys are found in Pacific and Indian oceans. The two species of Hapalogenys found in the Malaysia water are known to inhabit the coastal inshore waters near reefs. They feed on bottom invertebrates and small fishes. They are uncommon but sometimes can be caught by handline and fish trap.
There are about 7 species under the genus Hapalogenys worldwide.