The Old Mermaid Key is a quest item found in The Legend of Zelda: Oracle of Ages. This key, shaped like the lower body of a mermaid opens the door to the Mermaid's Cave, the game's sixth dungeon, but only in the Past.

The Old Mermaid Key is given to Link as a reward for successfully completing the Big Bang mini-game for the first time in the present.

See also

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