They breath air, and they grow large. I dont know if theyr in the monsterfish thread.that look like common catfishes that are sold here in local market as fish food.
Blue Catfish? theyr probaly in the monster catfish thread.opps sorry the one I mean is clarias batrachus which looks very close to the one you mentioned, and you are right, its very uncommon here.
does anyone else wanna add?
I have 11 of them in my tank. How bout Luciopimelodus pati, seems quiet rare also.