Snakehead invasion. (Environment).
Answer: The northern snakehead.
This summer, baby snakeheads were found in a pond in Crofton, Maryland, and environmental experts smelled trouble. Snakeheads, also known as Frankenfish, have large appetites. They can eat other fish, frogs, rodents, and baby birds.
Snakeheads come from China, where people eat the fish in soup. In the wild, the fish grow up to three feet long and weigh as much as 30 pounds.
How did they get to Maryland? A local man bought a pair of snakeheads as pets two years ago. But they quickly got too big for their tank, so he released them into a pond.
Experts became concerned that the hungry snakeheads would eat all the other creatures in the pond and invade nearby rivers, lakes, and streams. So the Maryland Department of Natural Resources poisoned the fish. But snakeheads have also been found in six other states.