The small, round fish with frog-like eyes doesn’t seem like much of a threat. But environmentalists say the round goby fish, which has been spotted as far south as Poughkeepsie and north in the Erie ...

Round goby were introduced to the Great Lakes from Eurasia in the 1990s. Kara Holsopple: Tell me a little bit about the species. What does it look like? Sara Stahlman: The round goby is pretty small.