Episode 569

"Revealed Secret - The Truth of Ancient Weapons" is the 569th episode of the One Piece anime.

Short Summary
As the whole island celebrates the capture and defeat of Hody and his comrades by the Straw Hat crew, who make their own plans to leave Fishman Island soon while Jinbe reluctantly tells Luffy that he cannot join his crew at the moment but he will in the future when he is finished his own tasks and obligations. They are all soon called to celebrate their victory at the palace with the banquet that was originally planned.

As the party begins to wind down Robin asks and discusses a troubling and possibly dangerous secret with King Neptune surrounding his daughter, Shirahoshi, the ship Noah, and the mysterious Joy Boy. Robin reveals the location of the ancient weapon from Sky Island she read two years ago being on Fishman Island and that Poseidon is on the island and deduces that the Mermaid Princess during the Void Century name was Poseidon and discovers that Shirahoshi is the ancient weapon Poseidon now.

Long Summary
The royal family have made a decision to release the human slaves that were under Hody's control as they were only on this island for resting and travelling like other pirates. The rest of the New Fishman Pirates have also been released however they cannot go back to the Fishman District. They are ordered to live on the main island working for the king, under the supervision of the Neptune army. From this day forward, the Fishman District will be sealed off and nobody will be allowed to enter.

Meanwhile, the Straw Hat Pirates had escaped from the plaza as they didn't want to be called "heroes". In the last episode Luffy had invited Jinbe to join his crew but unfortunately Jinbe refused to join as he had responsibilities to take care of which he had been taken a break from. However he promises that when he has fulfilled his duties and is free from them he will come to see Luffy and join his crew. After a while a Neptune army officer catches up with the Straw Hats with a den den mushi with Neptune on the other end. The king calls the Straw Hats back for a banquet in the banquet hall.

The Fishman District is now completely sealed off, Hoddy, Vander Decken, and the officers are now behind the bars in a prison tower. Wadatsumi is too large so he is taken far away by Surume.

Anime Notes

 * When the soldiers call the Straw Hats heroes prior to the banquet, the manga only shows Luffy saying that he wants all the meat. The anime adds Zoro saying that he wants all the sake.
 * The anime adds a scene in which Neptune was about to give a toast until Luffy interrupts him.
 * The Medaka Mermaid Quintuplets have more appearances in the banquet in the anime than in the manga.