I have several catfish in my 120 but the only ones that I see much when the lights are on are my shark catfish. The Sun, Synodontis ocellifer and the upside down catfish are always hiding. The Clown knives come out more than these guys. I added 2 Tiger shovelnose but my gar ate them. One night he also had my Cory in his jaws but he let go of the little guy and he is doing fine. All the catfish came with my tank.