Guide Note

An estimated 65 species belong to the fish genus Betta, all of which are characterized by their small size, aggressive temperament and ray-like, often brilliantly colored fins. The most common species is the Betta Splendens, also known as the Siamese Fighting Fish, which has become a popular pet worldwide.

All Bettas are highly territorial and will expand their crown fins when they feel threatened. The males are especially aggressive and many varieties, including the Siamese Fighting Fish will fight to the death when they encounter each other.

During the 1850s, Betta fighting became so popular as a betting sport in Siam (now Thailand) that it was licensed and taxed by the king. Consequently, people began selectively breeding Bettas to produce desired characteristics such as the brilliant colors and highly aggressive temperament that now distinguish most captive species.

Fast Facts

1. Average lifespan: 3 years
2. Average size: 3 inches
3. Can be kept in very little water
4. Will eat dried, frozen or live food
5. Appeared in the U.S. around 1910
6. Native to the Mekong Basin in Southeast Asia