I have a guppy fry along with platy and molly frys. Several of the Guppies have grown significantly larger than the other guppies, platies, and mollies to the point where they could easily damage the others when aggression occurs. However they are small enough to be easily destroyed by the fish in the tank that I intend putting them in.
The guppies are both male 3/4 inch long. They are both have become very aggressive. The issue is that I have an adult male guppy (who thinks he is a mickey mouse platy) that is 2 1/2 inches long and no adult females that have lived. There is an aggessive yellow swordtail adult male, 4 adult platys. The tank size is a ten gallon.
I do intend to upgrading to a larger tank in the next 6 months when the other fry is ready