Field Photo Friday Winner for June, 2018

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During a National Water Quality Network (NWQN) sampling trip in May to the St Lawrence River, Hydrologic Technician Dave Knauer finds a batch of Zebra mussels attached to the boat anchor.

person in yellow USGS shirt holding a pile of zebra mussels

During a National Water Quality Network (NWQN) sampling trip in May to the St Lawrence River, Hydrologic Technician Dave Knauer finds a batch of Zebra mussels attached to the boat anchor. (Photo credit John Byrnes) (Public domain.)