Sounds preggers to me!
The black mark is called the Gravid Spot and becomes more visable as the pregancy moves on.
Better get ready for some new arrivals! And congrats!
there may have been more, but she had them through the night, so some could have been eaten, anyway the fry are now safe in a breeding net, but the females remain swimming freely in the tank... the guppy that had these fry, is still huge, so i reckon more babies from her, still to come
so i reckon more babies from her, still to comehere is a picture of her....