Saltwater fish vs Freshwater Fish

[LednertHurman1453]

I kept freshwater fish (breeding angels, bettas, gouramis successfully, failing with discus) but that was a LONG time ago although I do not remember issues with longevity. Some saltwater fish have short life spans but most are long lived (at least for me). However, my koi will outlive me for sure.

Koi bettas are very long life... But i think your koi betta except