The Five-Eye Reef gets its name from the way it looks from above. Inside the perimeter of the reef’s rocky walls are five circular, eyelike pillars. After you rescue Aryll from the Forsaken Fortress, enemy Warships and wall-mounted cannons appear here.
Sea Platform
Sail up to the single Sea Platform in this sector and climb its ladder. Defeat the enemies on top of the platform to reveal a chest, which contains a minor reward.
Silver Rupee (via Treasure Chart #12)
Find and open Treasure Chart #12 (found inside the Earth Temple [C7] dungeon) to pull a chest from the Great Sea near the Five-Eye Reef. The chest contains a Silver Rupee.
Treasure Chart #41
Bomb all the Warships and wall-mounted cannons that guard the reef to reveal a chest on the reef’s central eye. Go to the narrow opening in the wall and walk up the slope and across the top of the reef’s wall until you reach its highest point. If needed, play the “Wind’s Requiem” to set wind’s direction. Then use the Deku Leaf to float to the chest, which contains Treasure Chart #41.