I had a betta a while back, Titan. He was a solid white half moon betta. In the light he would shimmer a baby blue color.
Here he is trying to fight my camera...lol
18/365 fierce by adayinmylife9, on Flickr
It was always fun watching him create bubble nests
4/365 Preparing for fatherhood by adayinmylife9, on Flickr