The onespot barb or Teri barb, Puntius terio, is a tropical freshwater fish belonging to the Cyprininae sub-family of the family Cyprinidae. It originates in inland waters in Asia, and is found in Pakistan, India, Bangladesh, Myanmar. It was originally described as Cyprinus terio by Dr. Francis Buchanan-Hamilton in 1822, and has also been referred to in scientific literature as Systomus terio or Barbus terio. The onespot barb is of commercial importance in the aquarium trade industry.