A SECRET WEAPON FOR GIANT KOI FISH

I’ve never owned a koi betta prior to and I was questioning if it’s normal for them to change shades rapid? I’ve had my Galileo for almost two months and in that time he’s gotten darker and it is now transforming to generally be lighter.The Tale of how koi betta fish arrived about is intriguing. The 1st koi betta fish were being developed w