From Times Free Press

The fish are Asian carp, an invasive species whose growing population has migrated from the Ohio River into the Tennessee River, threatening the region’s renowned biodiversity, commercial fishing industry and posing a health risk to recreational boaters.

Day after day as the crew works, the constant sound of construction startles the fish, which spring from the water in response. It’s a constant reminder of what some biologists fear may be the greatest threat to the region’s freshwater.

The sound barrier here is to be the first of its kind used to combat the spread of Asian carp through U.S. freshwater river channels, and is seen as a crucial step in the nation’s fight to keep the invasive species from decimating the freshwater ecosystem.

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