Lord Matsya: Matsya was the first Avatar of Vishnu. Lord Vishnu took the form of Matsya to save the earth and vedas from hayagriva which were hidden in deep oceans of the earth. During the time of great floods (that ends current civilization) as Matsya Avatar Lord Vishnu saved the first man, Manu, Saptha rishis and other life forms in a giant boat so that they can start a new civilization.