I just bought it from a local pet store. I had been looking at it for a while (months?) and forgot about it when I didn't see it anymore. I thought they sold it until they pulled it out again. So I bought it. I have no idea on it's origins and the management changed at the store, so I couldn't even ask them. For as long as I remember it's had the same coloration. It may be a little more pronounced now that it's older.