 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.In the Great Lakes the introduced tubenose goby was infected with 6 parasite species, but the infestation with every particular species was very low.It is included as paratenic host to the life cycle of the parasite of turtles, the nematode "Spiroxys contortus".