Back in the days when you just bought fish and stuck em in a tank and cleaned them out when it was hard to see the fish any more, my dad had a couple of cold water tanks. Every now and then, I would find something interesting at the pet shop and take it home. One day I bought a black catfish with a silvery white underbelly that the man said was coldwater and would get on fine with the goldfish, shabunkins etc. I called him Slartibartfast and he lasted quite a while in the tank before he started getting big and a bit aggressive, when he was given a tank all to himself. He got to be about 12" plus long, I'd guess before he died. I was just wondering if anyone would know what type of fish he was, because I've never seen one since - infact I haven't seen a cw catfish for sale at all. Perhaps he wasn't meant to be cw.....