Goat Island is the island where Luffy first met Koby and Alvida. This island appeared only in the manga, while in the original anime, Luffy met Koby on the Lady Mary. The island was later included in the special Episode of Luffy.
It is a small, rocky island where small rocks covered the shoreline and a small forest is visible.
At some point, the Alvida Pirates made this island their base. After making Koby their chore boy, he planned for years to escape, building a small boat near the forest.
- One Piece Yellow: Grand Elements (p. 20), The island's name is revealed.