Rasboroides nigromarginatus is a species of freshwater cyprinid fish endemic to Sri Lanka where only known from small, shaded streams in the Atweltota region of the Kalu River basin.Batuwita, Sudesh; de Silva, M.; Edirisinghe, U. (November 2013). "A review of the danionine genera Rasboroides and Horadandia (Pisces: Cyprinidae), with description of a new species from Sri Lanka". Ichthyological Exploration of Freshwaters. 24 (2): 121–140. It can also be found in the aquarium trade.
