We have 9 goldfish which we got from my mother in law when her pond sprung a leak. They where only small when we got them a year ago and different colours 3 white 4 red & 2 black, the black ones soon turned red but over the last month 1 red fish has slowly turned white and now 2 other fish are starting to go white ???? Are they just maturing..... or have they've seen a ghost....koi !!!!