Nice find. You got a good eye. I would suggest looking at the Federal, State and Municipal (by)laws. Although I'm not familiar with American laws, I would assume there is a law somewhere that makes it illegal to keep any channa or parachanna in an aquarium (regardless to whether it was caught in USA or not), unless you are some kind of research facility.
However that brings up a good point. Do your laws prevent you from keeping only fish from the genus channa, or do they prevent you guys from keeping fish from the genus parachanna also?
My local bylaws that prohibit the keeping of certain reptiles were recently changed due to too much "grey area". To improve this grey area they broke it down to prohibiting specific species and genus', opposed to size requirements or whatever other dumb system they were using.
Under the new bylaw Morelia Amethistina are prohibited, however recently many of the M. amesthistina subspecies have been classified as separate species all together (clastolepis, tracyae, etc). Therefore I was able to legally keep a "scrub" python even though I'm sure those who developed the bylaw meant to make all "scrub" pythons illegal.
Furthermore the current bylaw has a section on venomous animals. It simply says that all venomous snakes, spiders, scorpions or other invertebrates are prohibited. However it does not mention venomous lizards, and heloderma is not included as a prohibited genus under the section about lizards. Therefore, it seems completely legal to keep gilas and beadeds. I wont be the one to push my luck though. They have been forgiving enough with my collection. Mainly because I have been keeping big reptiles for 10+ years, well before the bylaws were passed, and that I used to do public educational shows.
It sometimes pays off to read the laws imposed on you. Don't push your luck too much though.
JMorash