[Aus]

I'm curious as to how many posters have had mature bettas suddenly change colour. If so - got any pics?

Sid Fishus has gone from a solid deep red with a tiny bit of blue on his dorsal fin (when I first got him a few weeks ago):

to this (taken a couple days ago) - you can't see his fins, but the dorsal is almost 1/4 blue as of this morning, and there's more blue 'rays' in his tail:

Anyone know what (beside the change from fry to mature fish) causes colour change? Food? Water quality? I'm really curious as to how and why this happens.

 

[Pitluvs]

Check out Freddy lol He's actually turned more yellow since this post.

I think all of my Bettas turned color when they were happy and in stable tanks with yummy food. This ones not so drastic:

Twitch Before:

Twitch After:

 

[Aus]

Pitluvs, LOL. I'd forgotten all about Freddy! Daughter and I were marvelling over his colour change not long ago.

Twitch has turned such a pretty green (or is that turquoise?)! So this is pretty common, then? I figured it might be, and also that it was something to do with water and nutrition.

Can't wait to see a few more 'chameleon acts'.