Voracious invader: Nonnative snakehead wreaks havoc
Imagine a fresh water fish that can grow to the size of a rolled-up tent, has an appetite so voracious that it feeds on small mammals, and has reportedly killed humans with its razor-sharp teeth. Now imagine that this fish, after clearing a lake of all food sources, can emerge on the shore and squirm across land for days on its dorsal fins to find a new loch filled with fresh prey.

