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Wild About Illinois Fishes!
Family Gobiidae - Goby Family [nonnative]
Family: Gobiidae - Gobies are characterized by a sucking disc created by the pelvic fins, two dorsal fins, a rounded caudal fin and a blunt head with relatively large eyes and scales.
round goby (Neogobius melanostomus) [nonnative]
tubenose goby (Proterorhinus marmoratus) [probable]