Not a betta, but I returned from school today to find one of my feeder goldfish rescues laying on his side. I brought him home with a four others about two weeks ago so my dad's tank wouldn't look so empty anymore. He was the smallest one, skinny and a bit banged up, but had quite the personality and won my heart. I thought I would let him die naturally and left him in the tank, but when I went back to check on him, he had floated to the surface and part of him had been eaten away. I could see inside him. He was still breathing and moved his fins a little in an attempt to swim. I took him out and placed him in a smaller container of water and waited, but he wouldn't go. I didn't want him to be pain any longer, so I decided to euthanize. He went quickly. I buried him in the garden among many other lost friends. Swim in peace, little guy. Many would think that you were just a feeder, but not to me.
The only pictures I have of him. He is the little speckled one.