Betta ferox is a species of gourami endemic to Thailand. It is an inhabitant of a small river where it lives amongst the vegetation near the banks. This species grows to a length of 6.3 centimetres (2.5 in) SL.
Species taxanomy provided by GBIF Secretariat (2022). GBIF Backbone Taxonomy. Checklist dataset https://doi.org/10.15468/39omei accessed via GBIF.org on 2023-06-13; License: CC BY 4.0