Fish-Man Island Arc

The Fishman Island arc is the nineteenth story arc in the manga and anime series One Piece.

The Grand Line's Halfway Mark
Many days after departing from the Florian Triangle and the ghost ship of Thriller Bark, the Straw Hats continue to follow the log post in the direction pointing since the last set on Water 7. After making their way across many bizarre elements and fighting massive Sea Kings, they finally arrive directly above the compass's pointed location, where Fishman Island is supposed to be. However, instead of finding the long-sought destination, the Straw Hats encountered something more imposing: the Red Line, the continent that circled the main meridian of the world. Having entered the Grand Line originally at Reverse Mountain at the other end of the Red Line, this meant that the crew had traveled half-way around the Grand Line with the continent the only block preventing them from getting into the New World, and ultimately, to both Luffy's dream of becoming Pirate King and new crewmate Brook's dream of getting back to Reverse Mountain and reuniting with Laboon.

Unfortunately, being right in front of the massive dividing continent meant several problems for the stuck pirate crew. For one thing, the Red Line showed no means to cross right into the New World. For another, the position they were on around the continent was close to many of the crucial government landmarks, including the holy land of Marie Joie and Marine Headquarters. With the continuing log post pointing downwards, Luffy, Robin and Brook decided to use the ship's Shark Submerge to search for any signs of Fishman Island, only to find nothing after reaching the limit of 5000 meters except an angry rabbit Sea King! Chased to the surface by the creature, Luffy defeats it easily with his Gomu-Gomu no Rifle, which made it spit out a small mermaid (which landed right on a super-excited Sanji) and a starfish. The mermaid, revealed to be named Camie, introduced herself by trying to offer them for sale takoyaki. (as previously revealed in a cover story arc, she is the assistant for Hatchan's Takoyaki 8 stand)