What kind of livebearers is this?

[Eros44]

Anyone one know what the yellow one under the gambusia is? I bought it as a feeder guppy.

 

[Oddball]

female mickey mouse platy (Xiphophorus maculatus)

 

[MN_Rebel]

Also you don't have any gambusia in the picture. The silver and the yellow fish are same species. Also Oddball is wrong, it is not maculatus but actually X. variatus. Raised both species and I can tell that it's a variatus.