Witch of Cocoyasi Village! Arlong's Female Leader!

Eating out on deck, Luffy, Sanji, and Yosaku draw the attention of Momoo, a cow-like sea beast kept by the Arlong Pirates. The creature lunges for their food, but Luffy and Sanji beat it back into the water and then strong-arm it into towing the vessel straight to Arlong Park. Elsewhere, Usopp is taken to Nojiko's home, where a boy named Chabo recounts how Arlong slew his father during the destruction of Gosa Village. Usopp learns that Nami has sided with Arlong and that Nojiko is her adopted sister, and he struggles to reconcile this with how genuinely Nami had seemed to enjoy life among the crew.

At the park, Arlong and Nami confront the captured Zoro, who catches Nami flinch at any mention of her late mother, Bell-mere. Bound by rope and unable to swim, Zoro flings himself into the gate pool to escape, and Nami dives in to save him before ordering the pirates to lock him up. A report of Usopp near Cocoyasi Village draws Arlong away, and in his absence Zoro cuts down every pirate left at the base. In the village, Arlong corners Genzo over a hidden weapon, and Nojiko explains how the fish-man views humans as tools and extorts a monthly tribute from every resident, having leveled Gosa over a single missed payment. As Arlong moves to execute Genzo for the rebellion of owning a weapon, Usopp fires on him from a rooftop. The enraged fish-man rips a house from its base and hurls it into another, only for his own crew to restrain him to protect their income. Afterward, Genzo is treated, and Nami visits a marked grave on a cliff, resolving to gather one hundred million Belly to buy her village's freedom.

This episode belongs to the Arlong Park Arc and marks Genzo's first appearance in the anime, alongside the debuts of Nako and Pisaro and the location Cocoyasi Village. Sanji unveils his Collier Shoot technique here as well.