Black sphenops mollies in the commercial trade are pretty much a single fixed strain. Fry are sometimes born without the black pigment, which will develop in a few days to a week. If the adults are Sailfin Mollies, latipinna and/or velifera, the genes can be quite mixed up.
I would say the fry is probably a molly, based on the elongated body. Platy fry, even when newborn, are deeper bodied relative to the length.
I knew they looked like they were getting frisky. Lol. The baby fish will be donated to anyone willing to pick them up, or to a place that will keep them in a better suited environment once they grow bigger.
The adults more than likely ate the rest, live bearers like platies and mollies do that. Since you don't really have any plant cover in your tank (I'm assuming this is the tank you added the moss balls to?) it makes the fry really easy to catch and gobble up. They usually drop anywhere from 10-40 fry (closer to 40 ime) at a time.
Oh, it does look more like a molly to me too.
Yeah, looks like a molly. I generally keep all females in the tank if I do not want fry. The males in an all male tank hassle the other fish. I had a sword tail male do his best to woo a cory cat...... I must say though, the cory was a lot more active than usual trying to ignore the advances of the love sick sword tail
Adult female mollies can drop well over 100 fry every month. 30 was the number I chose assuming most of them would be eaten Thunder_o_b I once had a guppy that was madly in love with a baby L144 pleco, so I understand. Funny though, the guppy preferred that pleco to the female guppies