Known as the “Lord of the Fishes,” Matsyendranath (circa the tenth century A.D.) is revered as the founder of Hatha Yoga, having been initiated into the teachings by Shiva himself. While Shiva is known as Adinatha (“Primordial Lord”), Matsyendranath is considered the chief representative of the Natha lineage. One of the eighty-four mahasiddhas, he is associated with the Kaula sect of the Siddha Yoga movement. His main disciple was Gorakshanath.