This spring, an invasive silver carp bolted up the Mississippi River — right to the edge of where a researcher says the state has a chance to block the species from advancing any further.
The fish, tagged by the Minnesota Department of Natural Resources, took advantage of high water in May to slip around locks and dams as the river swelled and spillways opened.
A DNR report released to environmental groups this week showed the fish traveled about 35 miles against the current, from La Crosse, Wis., to just north of Winona, in less than a day.
