I recently purchase 2 male sailfin mollies. All is going well. I also have 2 male guppies. The four of them think they are a school. I was told by my local fish expert (aka local shop keeper who seems pretty knowledgeable) that a good school is normally an odd number.....so....I purchase another male sailfin molly. Problem is that the other 2 males seem to think he is a female and are trying to mate with him (quite funny). Sometime this seem to be almost aggressive. I worry that my new molly isn't fitting in. So my question is does anyone have this variety of fish and have you experienced the same problems? And as always thanks for you help!