Spiny pugolovka (Benthophilus spinosus) is a fish of Gobiidae family. Widespread along the southern and eastern coasts of the Caspian Sea. On the east it is common between the islandKulaly and Mangyshlak Peninsula in south. This species lives in brackish waters at depths down to about 43 metres (141 ft) and strictly avoids fresh waters. It can reach a length of 3.4 centimetres (1.3 in) TL.