The lifespan of betta fish is generally between 2 - 3 years, but this range may vary according to factors such as variety, living environment, and breeding management. For example, Siamese fighting fish can live up to 5 to 7 years or even longer under good breeding conditions, and varieties such as Chinese betta fish and blue paradise fish can also live up to 3 to 5 years under good breeding conditions.

The living environment of betta fish has a crucial impact on its lifespan. Appropriate water temperature and water quality are the keys to ensuring the health and extending the lifespan of betta fish. The suitable water temperature for Siamese fighting fish is 22 - 24 °C, while the suitable temperature for Chinese betta fish is 4 - 31 °C, and the optimal temperature is 24 - 27 °C. In addition, the lifespan of betta fish is also related to its gender. Generally speaking, the lifespan of male betta fish is slightly longer than that of female betta fish.
In order to extend the lifespan of betta fish, breeders need to provide appropriate water temperature and water quality, avoid sudden changes in water quality, provide nutritionally balanced feed at the same time, and keep the living environment clean and safe. Through these measures, the lifespan of betta fish can be extended to a certain extent, allowing them to show a longer beautiful time in the water.