I know I'm reviving this thread, but I love all Cephalosiluris so I had too. As for the i.d. of this guy, it's always hard to i.d. a fish thru a pic I'd lean more toward a Nic then a Apu. I lean that way because of the shape. Your lil guy seems too squat in the face to be a Apu or a Fow. Though I could be wrong, did you contact the person Miguel suggested for help i.d.ing him? In either case I've kept Apu's and they're hands down one of my favorite fish tied by Hydrolycus Armatus(Saber-Tooth Tetra), Trachycorystes Trachycorystes, and Asterophysus Batrachus(Gulper Cat).