Holy Marbles!!

[Bettabelieveit]

She's had him for a couple weeks now. He just decided to change one day...BOOM. Wearing a tuxedo! Who knows, he could be blue next week. It's just amazing... never experienced the marble like that before... not that hardcore.

 

[Dweenus]

Is a marble a fish COLOR or a fish 'breed'? Because I have a betta that is pinkish/whitish, and his tail is starting to turn blue.

 

[Seahorse]

I'd say color pattern.

 

[Bettabelieveit]

marble is indeed a color pattern, like, whhen a betta kind of has different patches of colors all over him (or her) that's marble and marbles change colors, some a lot more than others.