(Sanskrit: “Tortoise”), second of the 10 avatars (incarnations) of the Hindu god Vishnu. In this incarnation Vishnu is associated with the myth of the churning of the cosmic ocean. The gods and the asuras cooperated in the churning to obtain the amṛta, the elixir of immortality. The great serpent Vāsuki offered himself as a rope, and Mount Mandara was torn out for use as a churning stick. A firm foundation was required to steady the mountain, so Vishnu took the form of a tortoise and supported the churning stick on his back. An earlier reference to a divine incarnation as a tortoise identifies the animal with Prajāpati (the god Brahmā), who took that shape in order to create offspring.

The Kūrma avatar of Vishnu is usually represented in painting and sculpture in a mixed human-animal form. The human half, which is the upper half, is depicted wearing the same ornaments and holding the same weapons as in the usual images of Vishnu. Kūrma is also represented zoomorphically, as a tortoise.