Many states forbid Channa fishas a result of the discovery and a national ban on importing snakeheads to America were instituted in 2003. Channa species can however still be found in fish stores and in Asian fish markets since the fish is considered a delicates in Asia . Many aquarists are very upset with this prohibition since it prevents them from keeping these interesting fishes in their aquariums even if they live in areas of the US where the Channaspecies couldn't survive in the wild.
Channa species is due to fact that they breed air able to walk on land to find new waters to live and feed in. It also make it possible for Frankenfish to survive in small water bodies with low oxygen levels.
You can find more information about different Channa species, how to keep them in aquariums and the effects on the environment in areas where they been able to establish a population on this site.