Tropidinius Poey 1868 Apsilus is a small genus of marine ray-finned fish, snappers belonging to the family Lutjanidae.

The jaws are equipped with moderately sized teeth which are conical or bristle shaped and which are arranged in bands with the outer row enlarged.

They have a continuous dorsal fin which is not notched where the spiny and soft-rayed parts meet.

[4] Apsilus snappers inhabit waters with depths between 30 and 300 m (98 and 984 ft), typically over rocky substrates.

[1] In 1980 when G. David Johnson designated the subfamily Apsilinae within the Lutjanidae he used Apsilus as its type genus.