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One Piece: Season1 | Episode31
The Worst Man in the Eastern Seas! Fishman Pirate Arlong!
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.
S1 - E1I'm Luffy! The Man Who Will Become the Pirate King! Oct. 20, 1999
S1 - E2The Great Swordsman Appears! Pirate Hunter, Roronoa Zoro Nov. 17, 1999
S1 - E3Morgan VS Luffy! Who's This Beautiful Young Girl? Nov. 24, 1999
S1 - E4Luffy's Past! The Red-haired Shanks appears Dec. 08, 1999
S1 - E5Fear, Mysterious Power! Pirate Clown Captain Buggy! Dec. 15, 1999
S1 - E6Desperate Situation! Beast Tamer Mohji vs Luffy! Dec. 29, 1999
S1 - E7Grand Duel! Zoro the Swordsman vs Cabaji the Acrobat! Dec. 29, 1999
S1 - E8
S1 - E9The Honorable Liar? Captain Usopp! Jan. 12, 2000
S1 - E10The Weirdest Guy Ever! Jango the Hypnotist! Jan. 19, 2000
S1 - E11Expose the Plot! Pirate Butler, Captain Kuro! Jan. 26, 2000
S1 - E12
S1 - E13The Terrifying Duo! Meowban Brothers vs. Zoro! Feb. 09, 2000
S1 - E14Luffy Back in Action! Miss Kaya's Desperate Resistance! Feb. 16, 2000
S1 - E15Beat Kuro! Usopp the Man's Tearful Resolve! Feb. 23, 2000
S1 - E16Protect Kaya! The Usopp Pirates' Great Efforts! Mar. 01, 2000
S1 - E17Anger Explosion! Kuro vs. Luffy! How it Ends! Mar. 08, 2000
S1 - E18
S1 - E19The Three-Sword Style's Past! Zoro and Kuina's Vow! Mar. 22, 2000
S1 - E20Famous Cook! Sanji of the Sea Restaurant! Apr. 12, 2000
S1 - E21Unwelcome Customer! Sanji's Food and Ghin's Debt! Apr. 12, 2000
S1 - E22The Strongest Pirate Fleet! Commodore Don Krieg! Apr. 26, 2000
S1 - E23Protect Baratie! The Great Pirate, Red Foot Zeff! May. 03, 2000
S1 - E24Hawk-Eye Mihawk! The Great Swordsman Zoro Falls At Sea! May. 10, 2000
S1 - E25
S1 - E26Zeff and Sanji's Dream! The Illusory All Blue! May. 24, 2000
S1 - E27
S1 - E28I Won't Die! Fierce Battle, Luffy vs. Krieg! Jun. 07, 2000
S1 - E29
S1 - E30Set Sail! The Seafaring Cook Sets Off With Luffy! Jun. 28, 2000
S1 - E31
S1 - E32Witch of Cocoyashi Village! Arlong's Female Leader! Jul. 19, 2000
S1 - E33Usopp Dead?! When is Luffy Going to Make Landfall?! Jul. 19, 2000
S1 - E34Everyone's Gathered! Usopp Speaks the Truth About Nami! Jul. 26, 2000
S1 - E35Untold Past! Female Warrior Bellemere! Aug. 02, 2000
S1 - E36Survive! Mother Bellemere and Nami's Bond! Aug. 09, 2000
S1 - E37Luffy Rises! Result of the Broken Promise! Aug. 16, 2000
S1 - E38Luffy in Big Trouble! Fishmen vs. The Luffy Pirates! Aug. 23, 2000
S1 - E39Luffy Submerged! Zoro vs. Hatchan the Octopus! Aug. 30, 2000
S1 - E40Proud Warriors! Sanji and Usopp's Fierce Battles! Sep. 06, 2000
S1 - E41
S1 - E42Explosion! Fishman Arlong's Fierce Assault From the Sea! Sep. 27, 2000
S1 - E43End of the Fishman Empire! Nami's My Friend! Sep. 27, 2000
S1 - E44
S1 - E45Bounty! Straw Hat Luffy Becomes Known to the World! Oct. 25, 2000
S1 - E46Chase Straw Hat! Little Buggy's Big Adventure! Nov. 01, 2000
S1 - E47The Wait is Over! The Return of Captain Buggy! Nov. 08, 2000
S1 - E48
S1 - E49Zoro's New Swords and the Woman Sergeant Major! Nov. 22, 2000
S1 - E50Usopp vs. Daddy the Parent! Showdown at High! Nov. 29, 2000- S1 - E51Fiery Cooking Battle? Sanji vs. The Beautiful Chef! Dec. 06, 2000
S1 - E52
S1 - E53The Legend Has Started! Head for the Grand Line! Jan. 10, 2001
S1 - E54Precursor to a New Adventure! Apis, a Mysterious Girl! Jan. 17, 2001
S1 - E55
S1 - E56Eric Attacks! Great Escape From Warship Island! Jan. 31, 2001
S1 - E57
S1 - E58Showdown in the Ruins! Tense Zoro vs. Eric! Feb. 21, 2001
S1 - E59
S1 - E60
S1 - E61An Angry Showdown! Cross the Red Line! Mar. 07, 2001