Good photo, however it is hard to tell if either of them is pregnant. If you only got them today, then give them a chance to settle in, the "fat lazy one" may be struggling to adjust to its new home (water, temperature, surroundings, etc). Perhaps in a couple of days it will show more life. They are definitely both females and if they have come from a tank which had males in it, then they are both probably pregnant, mollies don't need much in the way of encouragement to become pregnant. Make sure you give them good quality flake food and maybe once or twice a week, treat them to a green pea, variety in their food will keep them happy and healthy.I just bought them today (specifically asking for two females) and at first I thought that only one was pregnant, she is fat and lazy and sits about the bottom of the tank and is about half the size of my other creamcicle but the other has the dark spot!
It takes around 4 weeks for them to give birth and you can't always rely on looking for the black spot to determine if they are pregnant. You mention that one looks very fat so keep a good watch on her, as she gets bigger and fatter around the tummy you may notice that she will start to hide amongst the plants and she will position herself in the water so that her head is raised and tail is lowered, this is a good sign although you have to be there to notice.Thanks, I will do that--- when will I know to separate them from the others?
Terrific. Did you manage to catch them or are you just gunna leave them where they are?The fat lazy one gave birth last night, I have a feeling she started her birthing process in the store, since she is flat bellied and energetic and seemingly done. I have 30 healthy fry -- no eggs or stillborn.
Saving 18 is a good effort, you forgot to say if you caught and separated them or left them in with the others.I have approx 18 saved.