Kurma is an avatar of the Hindu god Vishnu. Originating in Vedic literature such as the YajurVeda as being synonymous with the Saptarishi called Kasyapa, Kurma is most commonly associated in post-Vedic literature such as the Puranas with the legend of the churning of the Ocean of Milk, referred to as the Samudra manthan. Also synonymous with Akupara, the world-turtle supporting the Earth, Kurma is listed as the second incarnation of the Dashavatara, the ten principal avatars of Vishnu.