Episode 31: The Most Wicked Man of East Blue, Fishman Pirate Arlong
One Piece Episode 31 „The Most Wicked Man of East Blue, Fishman Pirate Arlong“. Adapts chapters 69–71. First aired: 2000-07-12.
- Read on in the manga from: Chapter 72 (Volume 9 – Tears)
- Title (Japanese): 東の海最悪の男！魚人海賊アーロン！
- Title (romaji): Higashi no umi saiaku no otoko! Gyojin kaizoku Āron!
- First aired (Japanese): 2000-07-12
- First aired (German): 2003-06-05
- Category: Story
- Arc: Arlong Park Arc
- Chapters adapted: Chapters 69; Chapters 70, pages 1-12; Chapters 71, pages 5-8