The goby is a native species from Europe, but is a problem because it has the one of the most largest species of fish. The main problem with the goby is it eats other fish eggs. There is over 2000 species of goby, think of how many fish that goby ate.
The round goby can displace native fish from prime habitat and spawning areas. Round gobies eat the eggs and young of other fish species. Have a competitive advantage over other species because of the ability to survive in poor quality water. It may be a small fish but is very harmful to are species of fish.
Goby was a native species on the shores of Europe it was brought here by getting through small sea vessels, and is now in our lakes, pond, river, and creeks.