Assiculus is a genus of fish in the "dottyback" family Pseudochromidae.

[3] A. punctatus is found in coastal areas in the vicinity of reefs and weedy areas; normally in rather turbid waters as deep as 30 metres (98 ft).

This secretive species frequents areas where there are highly eroded limestone reefs and rocks.

[4] The genus and species were first published by Sir John Richardson in an appendix to Volume 1 of John Lort Stokes' 1846 Discoveries in Australia.

[5] The specific name punctatus references the small blue spots on the dorsal part of the body and fins.