Guppy And Platy Mating?

[Brandi.]

I only have female Platties in my tank (looking for males to breed), but I had my male Guppy was in the tank for a bit while the two females were having their first sets of babies. It may be just in my head, but now my female platy looks bigger, maybe pregnant. I saw the Guppy following her around, so I was wondering if it was possible for them to breed with each other?

 

[fluttermoth]

No, it's not possible; platies and guppies aren't closely related enough to interbreed.

Livebearers can, however, store sperm from previous matings for 6 months or so, so she could well be pregnant again, even with no males platies around.

 

[fish.mw.breeder]

It is not possible... I learned this from her (fluttermoth). You are very smart, Flutter! Kudos!