Guppy Fry Question

[This Old Spouse]

How soon can one tell if the guppy fry will have fantails? My females mated with fantails ... I think. The fry are now 8 weeks old, and I'm wondering if the males should be showing if they have fantails by now.

 

[OldMan47]

At 8 weeks, it is unlikely that more than a hint of final fin shape and size will be visible in your guppies.