you are wrong. I have 5 Ctenopoma in my tank with very large bichirs. The Ctenopoma are incredible smart and shameless ha ha. The bichirs show no interest in them and the Ctenos rule the tank. I had rainbowfish the same size who got eaten at day one. also leopard ctenos get massive. An old ne can reach the size of your hand. You will find no fish with more personality. And they show their mood with their facial expression ha ha. I have 3 Ctenopoma kingsleyae and 2 ocellatum and i love those guys.