Sexing green severums and the like

Question
I have 2 juvie green severums in my south American biotope tank. Do you know how to sex them?

Answer
Matt-
Like most cichlids, severums are very tough to sex while in the juvenile stage.  The only way to sex them is during mating, which will be awhile.  The only way to tell them is during mating, in which the male will have a slight protrusion.  Thats it.  Sorry I couldn't be more helpful