I know that bettas can change color, but how common is it for a white cellophane male (delta tail) who was very transparent, to the point of seeing his internal organs, to change into a blue marble?
It started as a dark blue, almost black, saddle mark on his dorsal area, ( which admittedly, startled me and made me worry a bit til I realized what was going on ) which progressively got larger and larger, joining with other blueish black marks that appeared on his sides.
Here is him before, the day I brought him home from Petco, and him now, which I took just a few minutes ago.
“The day the power of love overrules the love of power, the world will know peace.”
― Mahatma Gandhi