south of Washington dc, any and every weedy creek will workNice catch, where was the general location where you were fishing?
There's no giant snakehead populations in United States. Only Northern Snakehead of Potomac River, Bullseye Snakehead of South Florida and Blotched Snakehead of Hawaii. None of them come from aquarium releases.
Like smallguy said, there are no known breeding populations have ever been discovered. The last live giant snakehead catch was in Rock River of Wisconsin summer 2003, the dead giant snakehead was discovered in Poplar Tree Lake in Tennessee Dec 12, 2006 and the recently washed up dead giant snakehead up on the shores of St. Charles River, Quebec City (Canada where the snakehead is legal) in 2010. It suggests that the giant snakeheads cannot survive the colder temperatures.I have heard/read reports of populations of Giant Snakeheads in the USA. They were from if I recall correctly from one of the eastern heartland states. If I find the article I'm going to post a link.
Here's one article there are others.
http://animal.discovery.com/fish/river-monsters/giant-snakehead/
i caught a ten pounder in orlando florida which is pretty rare it was eating all of the bass...
ya i used to catch big bass in this lake and then for like 3 months i would catch maybe one or two bass here and there but all small and they would come up with scars and chunks out of them then this big 10 pound snakehead hit a 1 inch swimbait hahaha gave me a run for my money we put him on the scale and he was 10pounds 2 ounces so ya he was a beast with a big belly lol