I've had my Betta since the 28th of December of 2015. He's always had a silver spot on the top oh his back area that goes to both sides.
Recently, I've felt like he's gotten more of a silver hue. I also flashed light on him and noticed he has this goldfish glitter under his chin(?) area and his...
What size is your tank?
What temperature is your tank?
80 degrees Fahrenheit
Does your tank have a filter?
Does your tank have an air stone or other type of aeration?
Is your tank heated?
What tank mates does your betta fish live with?