The avatar of Kurma is the deity Vishnu's second avatar, or incarnation, is known as the Kurma avatar.
He takes the shape of a tortoise and assists the gods in
churning the Ocean of Milk in order to attain the nectar of immortality
(amrta).
Avatar of the Tortoise may be found here.
You may also want to read more about Hinduism here.
Be sure to check out my writings on religion here.