02-04-2010, 12:55 AM
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they normally will stick to their own species when possible. Its usually when you mix.... say, only male guppies with only female mollies. I've seen pics of both hybrids. And just last Saturday saw some platyxswords at a auction that where sold as hybrids. They looked as you would expect. They had the shorter platy body and the males had short swords and where solid orange.
Sword/platy crosses are more common. I'm pretty sure they use hybridization to get the similar color patterns that swords and platies have. There are both mickey mouse varietys of this fish, I think it was developed on the platy first. Then some point someone crossed some MM platies with swords and the hybrid offspring where then bred back to swords for a couple generations selecting for the MM pattern. At least thats how I think they do it, but I have nothing to back that up.
Molly/guppy crosses are possible, but they are sterile as far as I know....