Snakeheads made their way all the way to the Potomac River in no time.
They did genetic testing and found the ones in the Potomac River are not related to the fish in the pond in Crofton, MD. My bets are the live fish markets and Asian community in the area, ended up with a handful getting released into the Dogue Creek area where they were first most abundant and they took off from there.
There is an unrelated population in parts of the Susquehanna River watershed as well. The ones showing up in the Rappahhanock are related to the Potomac River fish. My guess is either bucket stocking or some fish road a freshwater bulge and made it through the Bay.
