What was the name of the Inca cosmic serpent?

The Inca cosmic serpent was called Amaru.

Amaru was a powerful serpent or dragon-like being in Andean and Inca mythology. Descriptions vary, but it is often portrayed as enormous, sometimes double-headed, and capable of moving between the earthly, subterranean, and spiritual realms. Its form could combine features of several animals, including a serpent’s body, a bird or puma head, wings, and a fish-like tail.

The creature represented the deep forces connecting earth and sky. Amaru was associated with water, rivers, rain, fertility, earthquakes, the underworld, wisdom, and cosmic renewal. These associations could be benevolent—bringing water to crops—or destructive, through storms, floods, hail, and seismic upheaval.

Amaru should not be confused with Manka, Coya, or Huallallo. Those names belong to other figures or terms in Andean traditions; Amaru is the name specifically attached to the sacred or cosmic serpent. The word also appears in the name of Túpac Amaru, whose surname invokes this serpent or snake-being.