Now that the northern snakehead fish has finally been confirmed in Louisiana, what should you do if you see it? The snakehead, an Asian import that appeared in the U.S. more than 20 years ago, is a ...

There’s a foreign fish that’s so invasive and destructive to the Mississippi River Basin that the federal government plans to pour a billion dollars into barriers to keep it from infesting the Great ...

“Invasive” is a negative word. It refers to the unwanted, the obtrusive, and the undesirable. It’s fitting, no doubt, when talking about plants, animals, and fish that aren’t native to the U.S., ...