Will my Dalmatian molly and sailfin molly successfully breed?

Hello, my name is Dr. Shines and I am happy to help. There's only one photo of the Dalmatian Molly and it looks female but it's blurry. Here's a link with a photo showing a male vs female live bearer (which include mollies, platies and guppies) https://www.fishlore.com/aquariumfishforum/threads/sexing-livebearers-with-pictures.169520/ I hope this helps and please feel free to reach out any time.

Thanks for reaching out about Black molly, but a good photo would help. White spots can be infections, parasites, over-active mucus cells, and some other conditions. If the white spot is the anus and is slightly protruding, she could be gravid but maybe intestinal parasites. If concerned, seek the attention of an aquatic veterinarian. Good luck.

Depending on the size of your tank, 1 or 2 mollies should be fine. The one issue you may have is getting food to your ACFs. You may need to use a turkey baster or syringe to get the food to them before the mollies eat it.

Theoretically it is possible for them to have puppies, however, since your male is very old there is a possibility that he is not very fertile any more. You can have his fertility checked at a veterinarian who does such exams. Ask your vet. There is also a possibility that Diesel has severe arthritis and is not able to perform the act due to arthritis pain. You can have his semen taken by the vet and then have the bitch inseminated. This will require correct timing, so please consult with a vet who is experienced in artificial insemination.

Mollies do come in gold or orange colorations, but it is difficult to determine from that angle. If you can repost a broadside picture in a new question, that may make identification easier. If it is an egg laying species of fish, the third image could be an egg but I have reservations saying definitively without something for scale. It looks too large to be an egg. As an aside, if you leave the Molly fry in with adults, they will likely be eaten. You can separate the out, remove the adults, use a breeder screen or provide plenty of cover for them.

Hard to say from your description whether she is pregnant or ill. You can tell male from female Mollies by looking in the area of the anus. A male Molly has a so-called gonopodium. The gestation period of a molly fish is about 60 days. Female mollies can store sperm for months and may fertilize eggs as often as every 30 days, even without a male in the tank. Mollies may release 10 to 60 live babies at a time. Here is an illustration of sexing Mollies (and other live bearers)(credit: Mwahahahaa) http://photobucket.com/gallery/user/Mwahahahaa/media/bWVkaWFJZDoyMDk0MTEzNw==/?ref=

What a beautiful kitty! Unfortunately it can be really difficult to predict what a kitten will look like when two breeds are mixed. Habla would have more ragdoll genes than her daughter but it’s difficult to say whether or not her offspring will look more like a ragdoll, especially since she is part mixed breed. Good luck!