When can I tell the gender of my molly fry?

Izabela

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My little molly babies are about a month old....at what age can I be sure what sex they are? They all look like girls now...all 30 of them! LOL.
 

0morrokh

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You'll be able to tell once they are sexually mature which I'm thinking is pretty soon. I don't know why I'm thinking 6 or 8 weeks??
 

Richard

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Based on what I've seen with our Mollies, I'd say after 2-3 months you start to see anal-fin development, at which point you can tell the guys from the gals.
 

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