USGS scientists monitor the impact that invasive species are having in the Great Lakes region, including that caused by gobies (being caught underwater on hook and line by divers in the St. Clair River in Michigan), lamprey (caught in a trap in the Detroit River), and zebra mussels (close-up video captured in Lake Ontario). Video shot by Jeffrey Allen (USGS) and edited by Matthew Cimitile (USGS).

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