DETAILED NOTES ON KOI FISH VS GOLDFISH

I’ve in no way owned a koi betta ahead of and I was pondering if it’s normal for them to vary colours rapidly? I’ve had my Galileo for nearly two weeks As well as in that time he’s gotten darker and is also now shifting for being lighter.! Now to your best part... these "PEANUT" Koi's that arrived in now had me blown away!! The variability