A later invasive, the tubenose goby, does appear to have been stopped.

The western (freshwater) tubenose goby P. semilunaris is native to the fresh waters of the Black Sea basin.

During the long period this fish was considered as a junior synonym of the tubenose goby, P. marmoratus (Pallas, 1814).

The marine tubenose goby (Proterorhinus marmoratus) is a brackish-water species of fish in the Gobiidae family.

It differs from the closely related marine tubenose goby P. marmoratus by the head length, which constitutes 28-32% of the fish's standard length.

Western tubenose goby (Proterorhinus semilunaris)

The Caspian Tubenose goby is only representative of Ponto-Caspian fauna, which crossed 56 N.

Marine tubenose goby, Proterorhinus marmoratus (Pallas, 1814)

All cases of registrations of P. marmoratus in fresh waters mean the western tubenose goby P. semilunaris in deed.

In the Great Lakes the introduced tubenose goby was infected with 6 parasite species, but the infestation with every particular species was very low.

The tubenose goby found in the lower Neva and Gulf of Finland, described as Proterorhinus marmoratus, probably also the Caspian tubenose goby introduced from the Volga basin.

After introduction, the tubenose goby in the Morava River have 13 parasite species; the trematodes, such as Apatemon cobitidis proterorhini, Diplostomum spathaceum, Tylodelphys clavata, were most numerous in the parasite community.

Rare and protected species include the wild form of the Common carp, Umbra krameri (European mudminnow) from the Esociformes order, Pelecus cultratus from the Cyprinidae family, and Proterorhinus marmoratus (Tubenose goby) from the Goby family.

During the long period this fish was considered as only representative of the genus Proterorhinus.

The western tubenose goby, or freshwater tubenose goby, (Proterorhinus semilunaris) is a limnetic fish species in the Gobiidae family.