Round goby (mustakitatokko) – Neogobius melanostomus

The round goby is native to the Black Sea and Caspian Sea regions, from where it has spread to new water areas in ships' ballast waters or as eggs attached to the hull. The species was observed for the first time in the Baltic Sea on the coast of Poland in 1990. It was simultaneously found in the Great Lakes in North America. In Finland, the first reported observation was in winter 2005 in Kaarina and the following ones in Helsinki in spring 2009. Until now, the species has been detected in the nearby waters of 12 ports on the Finnish coast. 

In its native range, the round goby is a food fish, and could become so in Finland. In Poland, cod and cormorants have begun to feed on round goby.