According to About.com, Siamese fighting fish, also known as Bettas, typically live between two and three years. Natives of shallow waters in Thailand, Indonesia and other parts of Southeast Asia, Bettas are popular aquarium fish notable for their vivid coloring, long fins and aggressive temperament.
Male Bettas cannot be kept within the same enclosure as other males, although females are generally safe to keep in numbers. Other similar-bodied species of fish should not be kept with male Bettas, as they can be mistaken for rivals. Bettas are tropical fish that live best in temperatures above 75 degrees Fahrenheit. It is, therefore, not recommended to keep a Betta in a small bowl because of the challenge of maintaining a tropical temperature.