The Arulius barb is a large fast moving barb. It originates from India where it is found in the Tambraparni River basin. This is a comparatively small river basin in the state of Tamil Nadu in southern India. Most if not all Arulius barbs in the trade today are farmed in commercial farms for the ornamental fish trade.It is possible that the species that we know in the trade as Puntius arulius isn’t the true Puntius arulius. There are a number of similar species living in India and Sri Lanka all belonging to the so called P. filamentosus groupThe group was revised in 2005 which resulted in some species earlier considered sub-species becoming true species. Species similar to Puntius arulius includes P. assimilis, P. exclamatio, P. filamentosus , P. singhala, P. srilankensis and Puntius tambraparniei.
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