How long do betta fish live?

Betta fish live about 3 years on average, although some perfectly healthy fish may only live for 2 years. Some long-lived betta fish in captivity can survive for up to 10 years, but the majority have a lifespan of less than 5 years.

Because male betta fish do not develop their full color until they reach about 1 year of age, most of the betta fish sold in pet shops are already at least that old. Therefore, a male betta fish may already have lived up to half or a third of its natural lifespan before purchase. Female betta fish are typically 6 months or older when offered for sale.