04-04-2011, 05:09 AM
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Originally Posted by Chicklet
You can sex guppies at 2 weeks of age,
Magnifying glass, a good light, 1 fry at a time, Look for the gravid spot and not the anal fins,
Yeah, actually, I have identified females by gravid spot before the anal fin had differentiated. Don't know why I wasn't thinking of that. They were older than 2 weeks, old enough to see the spot without a magnifying glass. I think I'd have to want to know the gender really badly to go to the effort of using a magnifying glass on a 2-wk-old.