Two-Eye Reef

The Two-Eye Reef is a reef with two round reefs in the center, resembling one side of a six-sided die. If all the gun boats and gun turrets are destroyed, a Treasure Chart that leads to the Secret Cave Chart will appear.

A Great Fairy can be found on the outskirts of the reef. A cannon is used to kill the Big Octo. Once the octo is vanquished, the fairy will appear, thanking Link by doubling your magic meter.