i have done a search and have not found any large fish. just smaller fish. i think the biggest i saw was necro's 15", but i don't know if he still has it after the pond fell through before.
I have one thats around 10" maybe a hair bigger with about a 4-5" streamer off his tail. Dont want to take pics now because he is kinda beat up I had to throw an oscar in his tank temporaraly while my new moramota got established in my 210g
I have never owned one but i did se a 30" one at my lfs in a 3000 gallon tank.
The catfish i have owned are TSN, RTC and a goonch ( which cost me 300 and it died being shipped )
That sucks.There used to be a guy on here who could get different types of Amazon pimelodid cats but he has not been on in a while and I forgot his name.