Ballad of the Wind Fish

From Zelda Wiki.org

In Link's Awakening, Marin teaches Link the Ballad of the Wind Fish after she spies his ocarina. Link uses the Eight Instruments of the Siren to play this song in front of the Wind Fish's Egg in order to awaken the Wind Fish from his deep slumber.

In Majora's Mask, the Ballad of the Wind Fish is a famous song played by the Indigo-Gos, a Zora band whose guitar player Mikau recently died. If you play the song for Gorman whilst in the Milk Bar, he will give you the Circus Leader's Mask.