Betta fish life span is based on a few simple factors. Environment, diet, genetics and a little luck all play a role in how long your betta fish will live. Domesticated bettas, when cared for properly, have an estimated life span of about 3 years. It is not unusual for a betta to live longer than 3 years, but most bettas succumb to disease early due to factors like poor water … [Read more...] about Betta Fish Life Span