When I look at that molly, I question whether what I see is the result of age, or if he is a weak fish. Maybe he once was a strong, vigourous male. His body isn't a picture of strength and health now.
In a month, you'll know if the eggs those females carry were ever fertilized, and you may have a whole lot of fry coming from males along the supply chain. You may want him to be the father, but that may already be resolved. It's very rare for a pet shop molly to arrive unfertilized.
We don't often consider this when we want to breed mollies, but females choose males.
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