Gravid Spot In The Beginning

[PrairieSunflower]

I currently have 4 batches of guppy fry at different ages. I have noticed in batches 1 and 2 that there seems to be an almost paper-thin line (sort of charcoal in color) appearing on the backside of some of them... is this the beginnings of the gravid spot?

 

[OldMan47]

Please learn from those of us who have suffered through watching gravid spots and believing old wives tales. They are almost totally meaningless. A fish that is eating well will darken up in that area.

 

[PrairieSunflower]

I am unfamiliar with any old wives tales about sexing guppies. LOL I am just wondering if that is the beginning of being able to tell if they are male or female.

 

[fluttermoth]

It isn't! The so-called' gravid spot' is normally just the fish's gut and stomach filling with food!

 

[PrairieSunflower]

... then how do you tell males from females?

Here is a picture of one I was thinking must be a female...

Adult males don't have gravid spots... so why wouldn't it be the same for babies once they reach a sexable age?

 

[This Old Spouse]

The only real way to sex them is to wait for the male's gonopodium to become apparent after a couple of months.