What is a betta fish? Betta fish—also known as Siamese fighting fish—are among the oldest species of domesticated fish. Their scientific name, Betta splendens, combines two languages ...

We may receive a commission on purchases made from links. There are over 70 species of betta fish, with the most common pet varieties being the crowntail, delta, double tail, and halfmoon.

Vo Thanh Hai, 28, raises fish with showy colors, described by enthusiasts as 'Eastern jewelry', with prices ranging from hundreds of thousand to several million dong each.