yeah i didnt think of that, sounds like a reasonably theory there, the plan is to keep my cuckoo and give it a mate and get some yellow labs to begin with and see how it goes, but i love my firemouth alot and would love it to stay and have a few tame females also. my firemouth can be a bit kissy with the other fish, but it shares the same hiding spot with the cuckoo so i just wondered.......