i have a betta named fishy blue bubbles, i have had him for about a year now, i have no clue hiw old he was when i got him though. he is suprisingly strong, and pretty active too, when I turn off his light he lowers to the bottom of his tank and rests till I turn the light back on in the morning, during the day he will pick up gravel and throw it at the side of his tank lol he is pretty active all around I have never had a betta(or any fish for that matter) live this long before and the only thing I am doing different is i bought him a little betta tank, instead of keeping him in the 10 gallon, all the bettas i have ever had in that thing only lived for like 2 weeks.