''Betta falx'' is a species of

betta ''Betta'' is a large genus of small, active, often colorful, freshwater ray-finned fishes, in the gourami family (Osphronemidae). The best known ''Betta'' species is ''B. splendens,'' commonly known as the Siamese fighting fish and often kep ...

endemic Endemism is the state of a species being found in a single defined geographic location, such as an island, state, nation, country or other defined zone; organisms that are indigenous to a place are not endemic to it if they are also found els ...

to the island of Sumatra in

Indonesia Indonesia, officially the Republic of Indonesia, is a country in Southeast Asia and Oceania between the Indian and Pacific oceans. It consists of over 17,000 islands, including Sumatra, Java, Sulawesi, and parts of Borneo and New Guine ...

. It is an inhabitant of acidic, nearly stagnant water, where it can be found amongst the vegetation along the banks. This species grows to a length of .

References

falx The ''falx'' was a weapon with a curved blade that was sharp on the inside edge used by the Thracians and Dacians. The name was later applied to a siege hook used by the Romans. Etymology ''Falx'' is a Latin word originally meaning 'sickle' b ...

Taxa named by Heok Hui Tan Taxa named by Maurice Kottelat Fish described in 1998 {{Anabantiformes-stub