Potomac River

Snakehead, the former ‘Frankenfish,’ becomes Potomac game fish

The aptly named snakehead, a fish native to China, was already starring in horror films when it was discovered in the Potomac River in 2004, says Bay Journal. Now the snakehead is firmly established in more than 60 miles of the river, but "their fearsome reputation has softened some, at least among recreational anglers who've found they're fun to catch and not bad-tasting either.