Is it normal for koi bettas to change color?

[VioletThePurple]

When I first got her, she was labeled as a koi betta and had the colors of one. Now, like half a year later she has turned pink and blue. Her colors don't resemble a koi fish anymore and I'm confused.

 

[Colin_T]

yep, they change colour as they grow.

 

[betta4ever!]

Kois are marbles. So yep, they do change colors. Not only while they grow, but for their hole lives.I find that pretty cool. Also.... We'd love to see your girl!!

 

[DragonScales+Doubletails]

yes, your fish has the marble gene! my blue and white marble female is now more of a blue and white butterfly coloration.