Relationships among round gobies, Dreissena mussels, and benthic algae in the south nearshore of Lake Ontario

► We estimated roughly 1 billion round gobies occurred in the U.S. nearshore. ► Round gobies exert little lake wide control of mussel populations in Lake Ontario. ► Correlations among round goby, Dreissena, and Cladophora populations are complex. ► Round goby populations appear to exhibit a seasonal, off-shore migration.