As you see, there are 4 genus in this small family. The biggest genus is indeed called Pangasius with most members, to which paroon (#12) belongs. IDS (#4) belongs to a different genus - Pangasianodon.
Paroons are legal but their cousin the giant version of them is not. Sorry I for get the name. Makong or something I think.... is illegal and highly endangered. So the US customes class's the fish together so u can't get paroons bc the are the same as the "makong". But what people do us clip their dorsal fins to make them look like ID sharks to get them past US customes. Pet Zone in Cali get me mine. Cost me 220$ for 2 2" babies shipped from Cali to PA. And they where legit and didnt clip fins or anything.