Betta Fish: Can’t believe this is the same fish a year later

I brought Sprinkles home March 16 2025 and I can’t believe it’s been a year and he has changed SO MUCH I was worried at first. He is so much bigger. His color got so dark but apparently darker and more vibrant means they are doing well. I’ve also seen people say it could be a sign of aging but I’m not sure

Last photo is him in an angle I have never seen! Super cool.