25977 Ponticola kessleri (Günther, 1861) Gobiidae Gobies Gobiinae Gobiiformes Teleostei Bighead goby Europe and Asia: Danube delta (Braila, Lake Brates); Lakes Kagul, Yalpukh, Katlabukh, Kitai. Dniester from the liman to the region of Kamentes-Podol'sk. Dnieper to Dnepropetrovsk; Odessa and all coasts of the Caspian Sea; and Volga at Astrakhan. Absent from the Sea of Azov. In Ref. 92840, it reported that this species reached the North Sea basin through an artificial waterway connecting the Danube with the Rhine (well-documented) and within 4 years, the species colonized all suitable riverhabitats downstream of the invasion site. AMNH 20379 1955 Gobius kessleri AMNH 20537 1964 Gobius kessleri FB 2814052 2010 Ponticola kessleri