Determining Sex of Platy Fry

Joe G

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At what week can determin if a fry is male or femail. mine are about 5 days old
8 in nursery tank and about 5 in main tank.
 

Butterfly

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Probably about 4 weeks if they are still small you may have tio use a magnifying glass to get a good lookatr them. There are some pictures in breeding on sexing your fry if you need it.
Carol
 
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