Yes each of my bettas have little felt stockings with a snowflake on it that stick on their tank. I have put little trees and garland around tank or hang small xmas ball on lid so they can swim by and see it. Sounds crazy but they notice!! I also have a few fun tank decors like igloo. I love to play them Christmas music as I do tank maintenance. I think we all enjoy it :) Everyone gets a special meal too. Have fun, pamper them and enjoy the holidays! A new plant or a tank upgrade are good presents too.
Oh, that sounds so cute!! And playing them Christmas music - that's brilliant. I should do that! I'm thinking of getting my Betta a leaf hammock for Christmas, I think he'd really enjoy it. :)