Like most livebearers guppies and mollies are pretty easy to sex. The males have a gonopodium fin (penis) which is usually visible by 4 months but sometimes it could take upto 6 months to know for sure. The photo below shows a male and female Phalloceros caudimaculatus and the male has been highlighted.

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"How to sex Guppies & Mollies"
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28/07/2011 at 21h44 by "joefish72"






