Matsya is the first avatar of Vishnu in Hindu mythology.
Matsya can also refer to: Matsya (tribe), an Indo-Aryan tribe and kingdom in ancient India Matsya (kingdom), legendary kingdom based on the above in the ancient Indian epic Mahabharata Matsya Purana, an ancient Hindu text Matsya States Union, former state of India, merged into the state of Rajasthan "Matsya", an episode of the Indian TV series Sacred Games
See also Matsyendranatha, a Hindu and Buddhist saint and yogi