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Related to Eleotridae: Gobiidae
a family of littoral and fresh-water fishes of the suborder Gobidae (gobies). Unlike members of the other goby families, the fish do not have concresced ventral fins. The family embraces approximately 60 species, which are found in tropical and subtropical waters. A single species, the Chinese sleeper (Perccottus glehni), is found in the USSR, in the Amur River basin and the Primor’e region. In recent years, the Chinese sleeper has spread to the European part of the USSR and to Middle Asia. It is easy to catch with a fishing pole.