
Siamese fighting fish
NB. captive specimen.
Native to Malaysia, Cambodia, Thailand, Indonesia and Vietnam, the genus Betta contains more than 70 recognized species, but the fish most people are familiar with is Betta splendens, or Siamese fighting fish. Wild Betta fish species are a dull greyish-green with short fins.

The Siamese fighting fish also known as the betta, is a popular species of freshwater aquarium fish. The name of the genus is derived from ''ikan bettah,'' taken from a local dialect of Malay. The wild ancestors of this fish are native to the rice paddies of Thailand, Laos, Cambodia, and Vietnam and are called ''pla-kad'' in Thai or ''trey krem'' in Khmer. They tend to be rather aggressive.