euryhaline

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A large Alligator gar fish in a huge tank Royalty Free Stock Photo

Neogobius melanostomus The round goby Neogobius melanostomus is a euryhaline bottom-dwelling goby of the family Gobiidae,

The round goby Neogobius melanostomus is a euryhaline bottom-dwelling goby of the family Gobiidae, native to central Eurasia including the Black Sea and the Caspian Sea. Round gobies have established large non-native populations in the Baltic Sea, several major Eurasian rivers, and the North American Great Lakes.na distinctive black spot on the first dorsal fin.