The Javaen barb (Systomus rubripinnis), is a species of cyprinid fish native to Southeast Asia.

Genetic variability is well documented, the species can vary in appearance somewhat depending on locality with a number of variants recognized, some of which exhibit a greater degree or lack of red color pattern in the finnage.

Adults leave the floodplains when the water recedes in December or January[6] Chao Phraya, Mekong and Mae Khlong basins, Malay Peninsula and Indonesia.

Local catch history in Peninsular Malaysia indicates the species was only found in the far northern states (Perlis, Perak, Kelantan and Terengganu) and the far southern tip, Johor.

This has been attributed to aquarist and fisherman releasing the barb into new river channels as it coincides with the species rise in popularity in the fish trade, this is currently unconfirmed.