Specimens of the gobiid Knipowitschia caucasica (Kawrajski in Berg, 1916) were collected since 1999 along the eastern Adriatic coast. Specimens were found in waters of different salinity, from fresh to almost sea water conditions, in springs near the sea, in small lagoons at river mouths, and in the sea-influenced parts of rivers. Standard lengths of the 87 examined specimens varied from 18.5 - 35.7 mm. The present findings confirmed previously questioned presence of this species in the Adriatic Sea and provides data on morphology and ecology of the Adriatic specimens.