Hmm, puzzling. I flipped through 2 vlumes of Baenschs Aquarium Atlas, and finally decided it looked closest to a Nile Catfish (Badrus docmac). Assuming thats what this is, they get about 24" long, and are not a good community fish. Usually nocturnal fish, only coming out during the day for food. Very undemanding species, that prefures a sandy bottom with a large cave to sleep in.