I'm having trouble with my Cyphotilapia frontosa Kigoma. I think it's a male, just going off dorsal fin shape and the developing horrid forehead (Nuchal hump), please confirm or correct me if I am wrong. Anyway lately he has been bashing my male Otopharynx lithobates, to the point where the litho has been badly fin nipped and now hides among the rocks (not at all Haplochromine behaviour). I don't have any spare tanks big enough to house either of them so I am thinking I will have to sell the Kigoma, the only problem is I am not 100% sure on the sex and have no idea how much to seel him/her for? it's about 13-14cms and a couple of years old. I have attached a video, in the hopes that experienced Frontosa wranglers could help out.