Valencienna sexguttata, the chalk goby, sixspot goby, sleeper blue dot goby, is a species of goby native to the Indian Ocean and the western Pacific Ocean. It inhabits bays or lagoons in waters of from 3mto25mm (10feetto82feetm) with silt or sand substrates with larger pieces of rock under which to burrow. This species can reach a length of 14cm (06inches) TL. It can also be found in the aquarium trade.