Episode 411: The Secret Hidden on Their Backs - Luffy Encounters the Snake Princess
One Piece Episode 411 „The Secret Hidden on Their Backs - Luffy Encounters the Snake Princess“. Adapts chapter 517. First aired: 2009-08-02.
- Read on in the manga from: Chapter 518 (Volume 53 – A King's Disposition)
- Title (Japanese): 背中に隠された秘密 遭遇ルフィと蛇姫
- Title (romaji): Senaka ni Kakusareta Himitsu - Sōgū Rufi to Hebihime
- First aired (Japanese): 2009-08-02
- First aired (German): 2014-09-26
- Category: Story
- Arc: Amazon Lily Arc
- Chapter adapted: Chapters 517