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Amudar'ya; Aral Sea; Armenia; Afghanistan; Volga; Uzbekistan; Ural; Ukraine; Sweden; Slovakia; Serbia and Montenegro; Sea of Azov; Russian Federation; Romania; Poland; Palearctic; Moldova, Republic of; Mediterranean and Black Sea; Kura; Latvia; Lithuania; Kuban River; Kazakhstan; Iran (Islamic Rep. of); Hungary; Germany, Fed. Rep.; Georgia; Finland; Europe - Inland waters; Eurasia: lower reaches of rivers and brackish waters of eastern Baltic, Black Sea, Caspian Sea and Aral Sea. In Appendix III of the Bern Convention (protected fauna).; Estonia; Danube; Don; Czech Republic; Caspian Sea; Bulgaria; Black Sea; Belarus; Baltic Sea; Azerbaijan; Austria; Asia - Inland waters; Atlantic Ocean; Atlantic, Northeast
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