In my opinion, a male Cichlasoma melanura will also suit this female. My research is posted here https://www.monsterfishkeepers.com/forums/threads/super-red-monkey-diagram.732027/This fish turned out to be female, I placed it my male SRM. Very intense together, she is a third of his size and gave him the run around. Laid eggs but nothing came of it as he is infertile. She will be going with a male carpintis to see what happens