Snakeheads are sold in the aquarium industry. I'm guessing some geniuses decided it would be a good idea to release them into local waters when they outgrew their fish tanks.Or after they ate all of their tankmates.
I witnessed some guy catch 3 or 4 of them in a row at a marina on Grand Island in Buffalo N.Y. I couldn't believe my eyes . He didn't know what they were but I knew right away.........NOT GOOD!!!