can someone reply me please. I found that swordtails are harder to breed than mollies, guppies or Platys. My female swordtails (2) have died after getting impregnated. My aquarium shop guy told me that since the female swordtails know their baby wont survive cos other fishes might eat them they sort of dont give birth and die. I am not beliving this story. maybe I belive just a little bit. My guppies, Platys and mollies frys are all doing good. So why are the female pregnant swordtails dying without giving birth?