\nThought to occur naturally in southern (peninsular) Thailand, Peninsular Malaysia, and northern Sumatra, but has been introduced to other areas with feral populations now established in Singapore, for example.
\nType locality is ‘wetlands in the area surrounding Kuala Lumpur, Malaysia’.
\nInhabits still and sluggish waters, including rice paddies, swamps, roadside ditches, streams and ponds. These are often shaded by submerged, surface or marginal vegetation and sometimes contain little dissolved oxygen. Water conditions tend to vary and change rapidly during the annual monsoon season. Substrates can vary from leaf litter to mud, sand, or deep sediment. While most populations occur in freshwater some are found in brackish coastal swamps.
\nIntroduction of ornamental forms and other Betta spp. such as B. splendens is known to be having an adverse effect on the genetic integrity of some wild populations.
\nTemperature: 20 – 28 °C
\npH: 5.0 – 7.5
\nHardness: 18 – 179 ppm