Guppy fry all look female?

[Al Bundy]

My Guppy fry are now about 4 weeks old and they are starting to show colour on their tails. The thing is, they ALL look female, are they or am I being daft?

Thanks

 

[Annastasia]

It's possible. My latest batch of Platy fry were all females. But a few might be males.. you can't really tell until they are older, so it's hard to say.
Are you going by fin color, or are you going by the anal fin?

 

[sylvia]

The gonopodiums won't develop for a while yet so there's no way of telling which are going to be male just yet.

 

[Al Bundy]

I'm going by the shape of the fin. They are all identical to the female. Both the male and female had yellow anal fins. So have all the fry.

 

[Annastasia]

I'd just wait a while...as Sylvia said, Gonopodiums take a while to develop.