Vasuki (Sanskrit: वासुकी, वासव) is a naga, one of the serpents of Hindu and Buddhist mythology. He is a great king of the nagas and has a gem (Nagamani) on his head. Manasa, another naga, is his sister. Vasuki is known in Chinese and Japanese mythology as being one of the "eight Great Naga Kings" (八大龍王 Hachi Ryuu-ou), amongst Nanda (Nagaraja), Upananda, Sagara (Shakara), Takshaka, Balavan, Anavatapta and Utpala.
Read more about Vasuki: Legends of Vasuki, Descendants