Snakeheads Strengthening Hold on U.S. Waters

The aggressive snakehead fish.

hide captionThe aggressive snakehead fish has become a threat in parts of the United States, where it is pushing local fish out of their habitat.

Corbis
The  aggressive snakehead fish -- which has a voracious appetite and can live out of water for days

hide captionThe aggressive snakehead fish — which has a voracious appetite and can live out of water for days — has become a threat in parts of the United States.

Corbis

Authorities say they face tough odds in trying to stop the spread of the northern snakehead, a sharp-toothed, destructive fish from Asia that's turned up in the Potomac River — apparently dumped there. Officials say the aggressive, invasive species will wound ecosystems and hurt the local fishing economy. NPR's John Nielsen reports.

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