Mermaid's Cave

The sixth dungeon in Oracle of Ages. It is where you find the Mermaid Suit and the sixth Essence of Time. The Boss is Octogon. Out of all the dungeons in Oracle of Ages, it is considered to be the most annoying, as constant time travel is required to finish it.

The Mermaid's Cave requires a key to enter which can be won by beating the Goron Dancing Game. The dungeon is found at the Rolling Ridge behind a waterfall in the past and built into a wall is the present as the waterfall has dried up.

Trivia

 * The Miniboss, Vire is also found in Link's Awakening.