Are male guppies not born with gonopodiums?

[pookiemct07]

I am trying to sex my guppies and I'm wondering if I just need to wait a while. While they all have fancy tails (their moms both are fancy-tailed), none of them seem to have gonopodiums. Also, they are not terribly colorful yet - other than the tails. I would estimate that the oldest ones are maybe 2 months old. I just want to get the males to another tank before any more hanky-panky goes on. Anyone have any answers for me?

 

[Sodapop202]

It's hard to tell with young guppies. With fancy guppies you have to look at the colouring and the tail shape while they're young. I find that male guppies have a longer and more flowing tail while the females have less colouring on their bodies. Hope it helped!