Priolepis nocturna, the Blackbarred reefgoby, is a species of goby native to the Indian Ocean and the western Pacific Ocean where it occurs at depths of from 8 to 30 metres (26 to 98 ft) on coral reefs. It inhabits crevices in the reef. This species can reach a length of 3.9 centimetres (1.5 in) SL.