Snakeheads were illegally dumped into a pond in Crofton, Maryland two years earlier. They spread into the Potomac River drainage, eventually making their way into Virginia streams. They finally ...

The northern snakehead fish, now known as the Chesapeake channa, has long been established in the Chesapeake Bay.

(Read more: Fishermen battle invasive ‘frankenfish’ snakeheads.) The largest U.S. invasive population lives in the Potomac River drainage of the Chesapeake Bay watershed. In 2002, a snakehead ...