When do molly fry sexually mature?

[ocminpin]

I have a batch of 6 week old Dalmatian Molly fry moved into my 20 gallon tank that I just separated from my younger fry. I noticed one of the fry chasing around others in a similar way my male adult Molly does with my females. I'm looking very closely and trying to see a gonopodium but I can't be certain... It's not a constant behavior, just something I noticed earlier. The fry are from 1/2"-- 3/4" and there are approx 35 of them...
What do you guys suggest?

 

[ocminpin]

I saw one of the lil guys/girls fanning his/her top fin while playing (?) with the others... I'm wondering if it's a little boy having a little fun there..
Does anyone have experience with Molly fry and when they mature?

 

[GhillieSniper115]

I have a batch of 6 week old Dalmatian Molly fry moved into my 20 gallon tank that I just separated from my younger fry. I noticed one of the fry chasing around others in a similar way my male adult Molly does with my females. I'm looking very closely and trying to see a gonopodium but I can't be certain... It's not a constant behavior, just something I noticed earlier. The fry are from 1/2"-- 3/4" and there are approx 35 of them...
What do you guys suggest?

Idk about mollies but it took my swordtails about 2 months to mature enough to be noticeable as male or female. Maybe three months for u