Episode 31

"The Most Wicked Man of East Blue, Fishman Pirate Arlong" is the thirty-first episode of One Piece.

Summary
The crew chases after Nami, who stole their ship, and Yosaku takes time during the trip to explain about Arlong and his Fishmen to Luffy and Sanji. Meanwhile, Usopp, Johnny, and Zoro arrive at the island Nami docked at.