Is my male guppy really a female?

[Hummingguppy]

A few days ago I bought three guppies that i thought were males and put them in my all male aquarium. I was watching one of my guppies today, and he is really fat. Is it possible that my male is a female? I know it usually easy to tell because of there beautiful tails, but he does have a bit shorter tail.... could he be a female? But none of the other males chase him, is he a he or a she?

 

[Regz8000]

Post a picture of a side view of it so we can identify it

 

[fishfan88]

If you want to know for sure, look at the anal fin. In females it is fan shaped and males have pointed ones. Also, only females will have a gravid spot. I have some males that I would think were females because of the coloring but I know theyre males because they don't have a gravid spot and the way their anal fins are shaped.

 

[AngelFishGirl]

Side view picture please?

 

[freshwaterashley]

Can you post a picture from the side view?