who is lovin who???

[Sgooosh]

The thing is that both Xiphophorus species are able to crossbreed. But knowing this fact, doesn't mean that they will...

If there are no other mates of the same species present, the odds of a mating across species lines become greater.

yeah, I always make sure to have at least a pair of different but "compatible" livebearers and they hang out in their own groups.