Barilius mesopotamicus, the Mesopotamian minnow or Mesopotamian barilius, is a species of fish in the family Cyprinidae. It is found in rivers, streams and irrigation ditches, usually with some flow and water temperatures from , in the Tigris-Euphrates basin of Iran, Iraq, Syria and Turkey.Coad, B. W., & F. Krupp (1983). Redescription of Barilius mesopotamicus Berg, 1932 a poorly known cyprinid fish from the Tigris–Euphrates basin. Cybium 7(1): 47-56. It reaches a length of about .
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