Signigobius biocellatus, the Twin-spot Goby or Crab-eyed Goby, is a species of goby native to the Western Pacific Ocean where they can be found in areas of sand, silt in lagoons, or coastal bays with nearby cover such as rubble, coral, or leaf litter. They can be found at depths of from 1 to 30 metres (3.3 to 98.4 ft). This species can reach a length of 10 centimetres (3.9 in) SL. It can also be found in the aquarium trade. It is currently the only known member of its genus.