i bought my guppy pregnant fish from last thursday about 2 weeks ago.she is not a blonde guppy . the color of her tail is clear white like you can see water through her tail .now its like 2 weeks she didn't give birth yet . her gravid spot look kinda yellow and her stomach look even get bigger on this monday. wednesday her belly is still big and her gravid spot is turing in to red and when she poop the poop was red too.now today thursday her belly is back to kinda blackish and yellowish agian. so do you know what happen to this fish and is she okay?