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 3 to 25 metres (9.8 to 82.0 ft) with silt or sand substrates with larger pieces of rock under which to burrow.

This species can reach a length of 14 centimetres (5.5 in) TL.

It can also be found in the aquarium trade.

This Gobiidae-related article is a stub.