Beware the night when the crescent moon
East of there
Spectacle Island is a small island found in the Great Sea at C2 in The Wind Waker. It is home to Salvatore, who hosts the Barrel Shoot mini-game. The very first time Link successfully completes the mini-game, he will be rewarded with a Piece of Heart, and the second time Treasure Chart #17. However, every time after that he will get 100 Rupees. The Ghost Ship appears at this island, on nights when there is a crescent moon pointing upwards.
The Blue ChuChu is under the wooden bridge in the sand.