Yup, the offspring are sterile, according to my experience. They all possess gonopodiums, all trying to breed each other, even though the other one has a gonopodium. They are also getting to be 3" or so (which is obviously surpassing the maximum length of the common guppy) & one of them is really fat, like a female, although, as I said, has a gonopodium. They are showing mostly a black colouration, but some of the colouration of the guppies is showing also (only a bit; bit a gold or greyish scales), just like the pictures on my topic/thread.
Josh275: My guppy/molly hybrids were accidental, as the male molly was more interested in the female guppies, and didn't even notice the female molly. I would suggest to just stick with guppies breeding with guppies and mollies breeding with mollies.
The reason is that I can't give them up (either sell or for free). I would like that they die of old age, but also that they don't produce any offsprings with a non-hybrid (therefore, hybridizing any other offsprings)... I guess what I'm trying to say is that they will just be taking up space, which you could use for any other non-hybrid fishes such as pure strain of guppies or mollies, which you could actually trade-in, unlike the hybrid of guppies and mollies, which I think should be kept to yourself and never be sold/given to anybody else.
Woofy: That looks very great, black colourations (like a black molly) and the shape of a male guppy.
*** I guess it would be time for an update... Since I'm only down to 7 now, due to the camallanus, in which 2 have died from. I'll try to get some pictures of them.