Dicotylichthys punctulatus, also known as the three-bar porcupinefish, is a species of porcupinefish endemic to the east coast of Australia, where it is found in coastal and offshore reef environments down to deep. This species grows to in standard length, although most only reach . This species is the only known member of the genus Dicotylichthys.
This species grow to in length
They are mainly found in western Pacific ocean around Moreton Bay to Bass Strait in Australia.
Found in estuarine, coastal and offshore reefs to a depth of . Nocturnal and solitary. Feeds on hard-shelled invertebrates.