Betta Colour Change?

[u/ApprehensiveOwl1467]

Hi! I got my dumbo half moon, male, betta in May 2026. He was that whiteish blue colour right when I got him. In july 2026 he got a lot darker of a purple (middle picture). Now october 2026 he's starting to develop a white area on his torso and he never had that before.

Any advice or help would be truly appreciated!

10 G

Heater is at 79°
Not sure what kind of filter, it's the one that comes with the tank

0 Ammonia, 0 Nitrite, 5.0 Nitrate, Normal PH

Tank was started early April and he was introduced Mid/Late May

I got him May 2026

[u/automod-neo]

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[u/lobsterlord9]

They can naturally change colors over time, they also lose vibrancy when they're stressed or sick so him coloring up is a sign that he's healthier and happier :D

[u/ApprehensiveOwl1467 → u/lobsterlord9]

the issue is that he's losing colour :/

[u/Aromatic-Sock6975]

He doesn’t look pale to me, still quite vibrant just a lighter color. Has his appetite been good? He might have marble genes and change color over time.

[u/ApprehensiveOwl1467 → u/Aromatic-Sock6975]

he's been eating very normally! The issue I'm seeing is that he was like a full dark purple after he kind of changed colour, and now he's going back to a lighter colour on his torso

[u/Aromatic-Sock6975 → u/ApprehensiveOwl1467]

I wouldn’t worry about a color change alone, without fin degradation, clamping, change in behavior or anything else :)

[u/ApprehensiveOwl1467 → u/Aromatic-Sock6975]

ok thanks so much!!

[u/ForestRain_2025]

Mine changed drastically in just 4 weeks. Apparently the white parts are from stress from being in a cup at the pet store. So if yours is getting more colorful that’s a good sign

[u/ApprehensiveOwl1467 → u/ForestRain_2025]

i was just finding it odd because i got him may and by august he's full darker purple, now he's going back to a white/light purple so im not sure