Anyone has experience keeping marine molly

[Gary]

I am sure that most of your fish would eat the babies. When I had mine, the mollies were all that were in the tank and most of them seemed to find enough hiding spots in the rocks and made it, but some did get eaten as well.

At the time I was also running a canistar filter and many "lived" in there until I cleaned it.

[Reef Puffer]

i found that 90% went into the overflow (made it easy to get them out) and the other 10% snack food!