I've got a madtom but no pics. The only time it comes out is feeding time and then hes a blur. Quite possibly my favorite fish though its a lot of fun to watch him eat.
I used to have a tadpole madtom, but he died at 3.5 years old. He was a big one, though. About five inches long, if I recall. Psycho as a youngster but calmed down by year 2. I miss him.
I use to have 2. One was about 4 inches and the other 3.5. They were pretty cool when they were out but that wasn't too often. No pictures though. They are too fast and small.