Wind Fish
The 'Wind Fish' is a large, flying whale who makes his home atop Tamaranch Mountain on Koholint Island, inside of a giant egg. Mystery surrounds this creature.
The Wind Fish is a deity of sorts that is the creator of Koholint Island. During the course of Link's Awakening it is revealed that Koholint Island is a dream of the
Wind Fish, and that, should the Wind Fish wake, the island and all its inhabitants would vanish. This presents a moral dilemma for the player, as to finish the game, Koholint and all of the characters living on it must disappear. This is unavoidable upon beating the game, however, as the player only learns the true nature of the Wind Fish until after the final Nightmare has been defeated. The only character that is alluded to survive the "destruction" of the island was Marin, who became a seagull (this can beviewed if one finishes the entire game without dying once).
The Ballad of the Windfish is created during a minigame in Majora's Mask, but it is only in name since it sounds nothing like this version.