Grass goby goby is a host of larvae of epizootic nematode "Streptocara crassicauda". The grass goby is a dietary item for some commercial fishes, such as the toad goby. In the Sea of Azov, it is used for food by the harbour porpoise. The grass goby is a commercial fish in the Black Sea and the Sea of Azov, the Molochnyi Estuary, Tuzly's Lagoons, and in the Sivash. Grass goby The grass goby ("Zosterisessor ophiocephalus") is a species of goby native to the Mediterranean Sea, the Sea of Azov and the Black Sea. It is currently the only known member of its
Round goby invasive nematode "Anguillicoloides crassus". In the Vistula Lagoon, the most abundant parasites of the round goby are nematodes "Hysterothylacium aduncum" and "Anguillicoloides crassus". 25 species of parasites are noted in the round goby in the Great Lakes. The trematode "D. spathaceum" is most abundant core species overall. Also the cestode "Proteocephalus" sp. and the trematode "Neochasmus umbellus" are rather abundant. The round goby may circumvent more of the metacercariae of "N. umbellus" from completing their life cycle. The parasite “load” on the invasive gobies in the Great Lakes appears relatively low in comparison with their native habitats, lending support to