Can a molly and beta go in the same tank?

Yes, but there are a few things to keep in mind. Mollies are livebearers, so they can reproduce more quickly than bettas. If you only have a few livebearers in a tank with plenty of plants and hiding places, the betta may not bother them. However, if you don’t want babies, try not to have both molly and bettas in the same tank unless the tank is spacious