List of locked or secret doors, gates and the like on the Sayuka map that will require a key or suitably high skill to open them. This list also includes the locations of keys, levers, switches, etc. used to unlock or open closed passages or closed chests.
Locked / Secret, Sayuka
Locations on Sayuka
1
Hidden Passage
To open it you have to solve The Mural puzzle.
2Locked Door
Lock level 16. Can be unlocked with Underwater Dungeon Key.
3
The Mural
It opens nearby hidden passage. Correct order: Serpent - Shark - Whale - Kraken.