Matsya Jayanti is believed to be the day when Lord Vishnu appeared as Matsya Avatar (fish incarnation). Matsya Jayanti 2021 is observed on April 15. Lord Vishnu appeared as a one-horned fish to rescue the Vedas. Some scriptures also indicate that Matsya appears to warn about the great deluge (or Mahapralaya) that will destroy the universe and prepare it for regeneration.
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