Out of curiosity, do you know the genetic back ground of your breeders .... do you know if they have rose tail back ground? They are 2 ray - unlikely to be rose, I know. But they show signs of rose effect..... or other deformity.
Sorry, but your fry's fins don't look right. They look sort of incomplete - For example, pictures 3 - 6 looks as if part/s of fins are incomplete/missing. They are not growing equally.
Be extra careful if you plan to continue their line. Make sure they don't carry genetic flaws.