I have a common woodcat, and he is a great addition to my tank. I rarely see him during the day, but at night he cleans all my leftover food up (pellets, some algae wafers...etc.) if there is any. I also drop a few Aquadine flakes in right as I turn the lights off; that's his cue to come out at night. I think he may have eaten one of my Golden Wonder Killies as well, but I'm not sure, that could have been one of the Pink-Tailed Chalceus as well.
Either way, he's a great catfish, and only gets to be around 9 inches long I believe. Mine is probably around 6 inches right now.
I've attached a picture of the species of catfish I am talking about. It is extremely hard to get a picture of them, but I found this on PlanetCatfish.com.

Either way, he's a great catfish, and only gets to be around 9 inches long I believe. Mine is probably around 6 inches right now.
I've attached a picture of the species of catfish I am talking about. It is extremely hard to get a picture of them, but I found this on PlanetCatfish.com.
