Gravid Spot Question

[Larry_the_lobster]

Hi my guppies (only two females at the moment) their gravid spot seems to light and nearly disapeer at night when I wake up and check the tank its back again. now I know they cant be far enough along to be giving birth as they did so about a week ago. is this normal behaviour or could their be something wrong? thanks in adavance!

 

[Annastasia]

The fry may be turning around. Their eyes give the gravid spot some of it's color, and they will sometimes turn around at night, making it look lighter. It's nothing to worry about.