The Octo Chart is a special Sea Chart from The Legend of Zelda: The Wind Waker. It is found at the bottom of the Great Sea by using the Grappling Hook to bring up the Treasure Chest that contains it. It can only be found if Link has already found Treasure Chart #26. The Octo Chart shows the location of the six Big Octos scattered throughout the Great Sea, and how many eyes each one has. The number of eyes indicated also indirectly tells what the Big Octo will drop upon its defeat. The one four-eyed Big Octo hides a Great Fairy, the eight-eyed ones each hold Orange Rupees worth 100 Rupees, and the twelve-eyed Big Octos drop Pieces of Heart.

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