The Seven-headed Serpent (from Sumerian muš-saĝ-7: snake with seven heads) in Sumerian mythology was one of the Heroes slain by Ninurta, patron god of Lagash, in ancient Iraq. Its body was hung on the "shining cross-beam" of Ninurta's chariot (lines 55–63).
- Anzu, a great bird whose death was sometimes credited to Ninurta
- Bashmu, a possibly identical serpent slain by Ninurta
- Dragon, a beast slain by Ninurta
- Ushumgallu, the great dragon