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Invasive species ride tsunami debris to US shore
Debris from last year's tsunami in Japan is showing up on the West Coast, representing a whole new way for invasive species to enter marine environments.
Photos: Fighting sea lamprey in Lake Superior
The sea lamprey was one of the first non-native species to invade the Great Lakes, and it's been one of the most destructive. The eel-like parasite nearly wiped out the entire lake trout population. But scientists have devised ways to keep the blood-sucking fish in check, and that's allowed lake trout to make a historic comeback.
At a dam along the Brule River in Northern Wisconsin, Great Lakes Indian and Wildlife Commission section leader Bill Mattes shows MPR News a lamprey, a boneless fish that was responsible for nearly wiping out the trout populations in the Great Lakes.