I think its a synodontis ansorgii....... I had one that grew to about 10 inches and it only has 1 spike on the top of the fin..... small spots..... grey base color and it was a mean as hell fish this thing killed 2 18 inch plecos and a 13 inch oscar....... but idk if ur will depends on fish maybe? not much is know about them at all in the wild.... its really the closest one other than syno E. U could try it and watch it close cuz if i remember correctly retics really dont like to be picked on and have stoped eating cuz getting picked on. yes this is a rare fish but mine was wild caught it came it with a big shipment of fish that i help unpack found this in the same bag as a 8 inch delhezi bichir that was dead and beat to hell.....

