?? It is listed as 10" SL, which is about 12" TL, right what you quoted. Am I missing something?
http://www.planetcatfish.com/common/species.php?species_id=97
My notatus was 12" when I lost him.
I am dubious it is a hybrid, although I did mention it as a second choice. To me it looks like notatus.
Planet Catfish Cat-elog in its entirety including the sizes is one of the best things and a humungous, invaluable privilege we happen to have at our disposal. It does not consider any anecdotal data but only rigorous scientific data and info, including sizes.