Episode 16 - Defend Kaya! The Usopp Pirates' Intense Performances!

Episode 16
Protect Kaya! The Usopp Pirates' Great Efforts!
Japanese: 守れカヤ！ウソップ海賊団大奮闘！
Mamore Kaya! Usoppu Kaizoku-dan Daifuntō!

After a series of smaller confrontations, the Straw Hat Pirates are finally able to leave the island and continue their journey toward the Grand Line. They encounter a legendary creature that brings additional challenges and sets the tone for the adventures to come.