Recently, I bought several guppies from outsmart one of which was pregnant. After 3 days in my tank she gave birth, and now several months later,the babies are a fair size. But in watching these babies I realised, tall of them appear to have no colour at all, with black tails. The mother was a white and yellow colour, and Idk about the father. So, I was wondering if this is normal for newborn guppies or no...