The Six-Eye Reef gets its name from the way it looks from above—six circular, eyelike pillars are inside the reef’s rocky walls. After you rescue Aryll from the Forsaken Fortress, enemy Warships and wall-mounted cannons appear here.
Piece of Heart #23 (via Submarine #4)
Piece of Heart #23 is found in a submarine. Sail to the submarine, climb onto it, and enter the doorway leading inside.
Defeat the Moblins that patrol in here, and a ladder drops. Climb the ladder to reach a treasure chest, which contains Piece of Heart #23. Most of the barrels in the sub contain enemies, so leave them alone until you’ve defeated the three Moblin guards.
Sea Platform
Sail up to the single Sea Platform and destroy all its cannons to reveal a chest on top of the platform. Climb the Sea Platform’s ladder to reach the chest, which contains a minor reward.
Treasure Chart #26
Bomb all the Warships and wall-mounted cannons to reveal a chest on the reef’s southwesternmost “eye.” Go to the narrow opening in the wall and walk up the slope and across the top of the wall to its highest point. If needed, play the “Wind’s Requiem” to direct the wind, and then use the Deku Leaf to float to the chest, which contains Treasure Chart #26.
Silver Rupee (via Treasure Chart #6)
Find and open Treasure Chart #6 (inside the Tower of the Gods dungeon [E4]) to pull a chest from the Great Sea near the Six-Eye Reef. The chest contains a Silver Rupee.