The siamese fish of gourami

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.
This species is native to the mekong basin of laos camvodia vietam and thailand . The fish can be found in standing waters of canals, rice paddies and floodplains. It is listed as vulnerable by the ivcm.
They are called pla-kad (fighting fish) in thailand trey krem in khmer.
It comes in different species. and colors