Anthias ventralis Randall, 1979 Pseudanthias ventralis, the longfin anthias or longfin basslet', is a species of marine ray-finned fish, an Pseudanthias from the subfamily Anthiinae part of the family Serranidae, the groupers and sea basses.

The populations from the southern quadrant of their range normally has distinct and circular purple spots in this part of the back.

They do have a yellow dorsal fin, the colour just extending on to a small area of the back as far as the caudal peduncle.

Specimens from other geographical regions show differences in colouration to the above which represents the population from the type locality.

It is a secretive species which is normally recorded from caves or beneath ledges but have also been reported over coral rubble along steep drop-offs or the sides of channels.