I have one set of M. Johanni (1M +2F) and 1 set of M. cyanerhabdos (1M + 2F) <- probably
I also have several other groups in the tank (Labs and others) and although the Male M.Johanni chases other fish, there's been no fisticuffs.
The M. Johanni is the biggest territory hog out of all my fish. He will take 1/3 of the tank if he can get away with it.
The M. cyanerhabdos? female (if that's what it is) is nothing like the male? In fact, the carrying female is bluer, but I have another female with predominantly brown markings.
I understood that this set was still M. Johanni, but from a different place...
While on the subject, the M.Johanni females behave like males (showing off / shivering) and even though the male is the most territorial, busy digger in the tank, they`ve not produced yet - even though I`ve seen them "pretend" to lay eggs!