Our poor betta passed away the other day. I was going to euthanize him after I determined he really would not make it, but he deteriorated very quickly once I made that decision (perhaps he sensed it) and passed away in a matter of minutes. I buried him in one of our plants.
I believe he was three years old… perhaps a reasonable age for a betta. We got him from a Petsmart in Amherst. He made it across the country with us in a nalgene bottle; he was the only one of our many fish we were able to take with us. Amanda had taken to calling him the Eeff (evil evil fish fish) due to his seemingly rude personality to her, but I always got along well with him.