Siamese fighting fish

Siamese fighting fish
HM Orange M Sarawut.jpg
Selectively bred halfmoon male displaying his flared opercula
Scientific classification edit
B. splendens
Binomial name
Betta splendens
Regan, 1910

The Siamese fighting fish (Betta splendens), commonly known as the betta, is a popular fish in the aquarium trade. Bettas are a member of the gourami family and are known to be highly territorial. Males in particular are prone to high levels of aggression and will attack each other if housed in the same tank. If there is no means of escape, this will usually result in the death of one or both of the fish. Female bettas can also become territorial towards each other if they are housed in too small an aquarium. It is typically not recommended to keep male and female bettas together, except temporarily for breeding purposes which should always be undertaken with caution.[1]

This species is native to the Mekong basin of Thailand, Laos, Cambodia, Vietnam and mostly found at Chao Phraya river in Thailand. The fish can be found in standing waters of canals, rice paddies and floodplains.[2] It is listed as Vulnerable by the IUCN.


B. splendens usually grows to a length of about 6.5 cm (2.6 in).[2] Although aquarium specimens are widely known for their brilliant colours and large, flowing fins, the natural coloration of B. splendens is generally dull green, brown and grey, and the fins of wild specimens are short. In the wild, they exhibit strong colours only when agitated. In captivity, they have been selectively bred to display a vibrant array of colours and tail types.[3][unreliable source?]

Other Languages
العربية: سمك الفايتر
azərbaycanca: Betta splendens
bosanski: Sijamski borac
Ελληνικά: Ψάρι μονομάχος
español: Betta splendens
français: Combattant
hornjoserbsce: Betta splendens
hrvatski: Sijamski borac
Bahasa Indonesia: Betta splendens
italiano: Betta splendens
ಕನ್ನಡ: ಕಾಳಗಮೀನು
Bahasa Melayu: Ikan Pelaga
မြန်မာဘာသာ: ဖိုက်တာ (ငါး)
Nederlands: Siamese kempvis
português: Betta splendens
Simple English: Betta splendens
slovenčina: Bojovnica pestrá
srpskohrvatski / српскохрватски: Sijamski borac
Tiếng Việt: Cá xiêm
中文: 泰國鬥魚