It is not difficult to distinguish the sex of fighting fish: the dorsal fin, anal fin and caudal fin of male fish are longer and larger than those of female fish, and their body color is brighter than that of female fish, and the color of female fish is lighter. The stripes on the male fish are more obvious; Individuals are larger than females. In addition, the estrogen fish has a round "navel" at the front end of the belly, which looks like an egg attached to it, but the male fish does not. The tail fin of male fish will be long and dovetail-shaped, while the tail fin of female fish will be short and the dovetail-shaped is not obvious. Male fish can live for 3~6 years, and female fish can live for 2~3 years.

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