just got my hands on 8 n. brichardi. all between a 1" and a 1 1/2". 5 have stream like fins that resemble a male firemouth. would that make them male?... when they pair and breed will they exclude the rest of the school or will they stay together?... also, if i were to get 8 more with a total of 16 in a 60 gal, would that be okay?... all the info i can get from the experienced would help! thanks!