The 529th episode gives a wounded Sanji his transfusion at last, then sends the crew touring Fish-Man Island, reuniting with Pappag and Brook. The cheerful sightseeing curdles when the mermaid seer Shyarly glimpses a future in which Luffy himself lays the island to ruin.
Luffy's group scours the streets for a blood donor, but every fish-man refuses until Chopper notices humans slipping into a bar. Elsewhere, Ishilly and two friends stumble on the barrel Franky sealed Caribou inside, and, hoping it holds drink or treasure, they set about opening it. Sanji rouses from his transfusion, is told he rests at a friend's home, and racks his memory for how he was so gravely hurt, prompting Luffy and Usopp to beg him to stop before he loses more blood. The donors prove to be the okama twins Splash and Splatter, which throws Sanji into a screaming panic. Chopper then notices Luffy was poisoned yet unfazed, and Luffy chalks his resistance up to surviving Magellan's venom back in Impel Down, pinning the poison on the sword-wielding merman Hyouzou.
Behind the Mermaid Cafe, Camie asks her boss, the retired seer Madame Shyarly, to keep clear of Sanji and to hide where he is resting. Luffy and Usopp brush her crystal ball against her warning, and Camie lists the forecasts that made Shyarly renowned: she called the dawn of the great pirate era a year early, and she foresaw both the clash at Marineford and the fall of Whitebeard. That grim accuracy left the mermaid despising her own gift. The crew soon finds Brook reuniting with Pappag, and a taxi ride toward Gyoverly Hills brings out the tale of Vander Decken's mounting marriage threats against Princess Shirahoshi, the legend of the original cursed captain, and his grandson Vander Decken IX. Pappag adds that Big Mom now shields the island for a monthly candy tribute, having stepped in once Whitebeard was gone. Back in Coral Hill, Shyarly breaks down in alarm, having seen Luffy destined to shatter Fish-Man Island, and pleads that the straw-hatted pirate be driven off.

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Anime-only material includes the moment Ishilly's trio finds the barrel holding Caribou and moves to pry it open, plus a depiction of how Brook first reached the island and met Pappag. The donor search is drawn out further, with Usopp shouting down from Ryugu to ask passersby for blood. In the manga, encountering Splash and Splatter left Sanji foaming as he screamed, whereas the anime cuts the foam and has him leap about in fright instead. The dub likewise leaves out Luffy reading the next installment's title during the preview.
In Episode 529, the retired seer Shyarly has a vision in which Monkey D. Luffy destroys Fish-Man Island. The prophecy leaves her badly shaken and prompts her to beg that Luffy be driven off the island.
Episode 529 does not resolve this question; it only shows Shyarly foreseeing Luffy as the one who brings about Fish-Man Island's destruction. Her accurate track record, including predicting the Marineford war and Whitebeard's death, makes her fear the vision will come true.
Sanji panics because he learns his blood donors were Splash and Splatter, a pair of okama twins, and the news throws him into a screaming fright soon after he wakes up.
Chopper notices Luffy shows no ill effects despite being poisoned by the sword wielding merman Hyouzou. Luffy explains that surviving Magellan's venom back in Impel Down left him resistant to the poison.
According to Pappag in Episode 529, Big Mom now shields Fish-Man Island in exchange for a monthly tribute of candy, having taken over that role once Whitebeard was gone.
Looking for more on Fish-Man Island Collapses?! Shyarly's Prediction? The One Piece Wiki on Fandom has a dedicated page with community notes.
View on FandomThis content is original writing by Daddy Jim Headquarters based on the One Piece anime series, manga, and official materials. Episode and chapter references are cited where applicable.
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