Croilia mossambica

Croilia mossambica, the burrowing goby or naked goby, is a species of goby native fresh, brackish and marine waters of Mozambique, South Africa and Madagascar. This species can be found on fine-grained sandy substrates in still waters at depths of from 1 to 16 m. It can reach a length of 6 cm TL. It is currently the only known member of its genus.