Guppy Fry

[This Old Spouse]

About 40 fry this week. Question is, why are some very streamlined and others seem to have a very rounded and light-colored belly? Anything to do with sex?

 

[OldMan47]

Very young guppy fry may still be carrying a bit of egg sac. It will give them a very round shape for a day or two but not much longer. They also show a round shape right after feeding. A guppy fry is not much more than eyes and an appetite.