When do guppy fry colors begin to show?

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ConfusedCatfish

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Nov 7, 2020
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Im trying to determine the gender of some guppy fry but for now they are still so small they are almost transparent 😂 and i was wondering at what age their colors would show?
 

NoodleCats

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Feb 26, 2020
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You can start to sex some some time around 4 weeks, the females start showing a gravid spot while the males don't.

An example
Male fry
20200728_130713.jpg

Female fry
20200728_130847.jpg
 

dougall

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Mar 29, 2005
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You can normally look at the shape of the anal fin also. I would not try to go based on color.
 

Sprinkle

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It is easy to determine gender of youngster livebearers. Later days on, bois will be kinda yellowish and girls will be kinda greenish/greyish :)
 
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