Betta balunga is associated with the Betta akarensis complex
. This paternal mouthbrooding fighter occurs in the NE region of Borneo. Identification is based upon the face stripes. The sexes can be differentiated when mature without difficulty as the male has extended dorsal, caudal, anal and pelvic fins. The caudal, especially in the male is decorated with a pretty net pattern and the anal has a dark blue edge and above it, a light blue one (Jan Rehwinkel). Males are thought to be more intensely colored as well. According to the International Betta Congress
Betta balunga can be housed in pairs, species tanks, and community tanks. But pairs can be housed in a 10 gallon tank, groups should be housed in a 55 gallon tank or larger. These fish benefit from the cover from caves and plants. Betta balunga should have soft acidic water that is well filtered. They should be kept at mid 70s F. Similar species would be all Betta akarensis complex members.