Fish-Man Island

Lore & Background

Ten thousand years ago, the ancestors of fish-men and merfolk fled the surface world to escape human hostility, settling in this deep-sea sanctuary. Over millennia, they developed a unique civilization powered by bubble technology and the natural heat of the earth's core, creating the vibrant Coral City known as Ryugu Kingdom. The island is encased in a massive protective dome that filters sunlight into a perpetual twilight, allowing coral reefs to thrive while keeping out the crushing pressure of the deep ocean. The history of Fish-Man Island is defined by its complex relationship with humanity. While some fish-men harbor deep resentment due to centuries of slavery and discrimination, others dream of peace. This tension culminated in a violent conflict involving the tyrant Hody Jones and the ancient ship Noah, which threatened to destroy the island. The arrival of Monkey D. Luffy and his crew shifted the balance, leading to a historic declaration that the Straw Hats are now guardians of the island, bridging the gap between the surface and the depths.

In Their Own Story

The water pressure hums against the glass dome as a school of neon fish darts through the coral archways. Above, the silhouette of Noah hangs suspended in the dark abyss, a ghostly monument to past hatred that now stands silent. In the bustling streets of Gyoverly Hills, citizens breathe air trapped in shimmering bubbles, their laughter echoing off walls made of living sea-coral. A young mermaid watches a bubble drift upward toward the distant, imagined sun, whispering a promise of a future where her people can walk on land without fear. Here, beneath the weight of an ocean, hope floats lighter than water.

Reader's Guide

Fish-Man Island serves as the first major stop for crews entering the New World after crossing the Red Line via the Knock Up Stream or navigating the treacherous Calm Belt. It is a place of breathtaking beauty and profound political significance, acting as the only known safe passage for ships to bypass the massive Red Line that divides the world. The island's role in the narrative is pivotal; it explores themes of racism, slavery, and reconciliation through the conflict between fish-men and humans. The kingdom of Ryugu, with its opulent palace and diverse districts like Gyoncorde Plaza and Mermaid Cove, showcases a society struggling to define its identity after centuries of isolation. This location matters because it is where the Straw Hat Pirates officially entered the New World and secured their first major alliance against the Four Emperors. It also revealed the truth about Joy Boy and the ancient promise made ten thousand years ago, setting the stage for the final saga. Without this island, the path to Laugh Tale would remain blocked by the Red Line.

Did You Know?

• The main story arc covering Fish-Man Island adapts material from the 61st to the end of the 66th volumes of the manga by Eiichiro Oda.
• A remastered and condensed version called One Piece Log: Fish-Man Island Saga ran for 21 episodes from November 2024 to March 2025.
• The opening theme 'We Go!' for the original season is performed by Hiroshi Kitadani.
• The final four episodes of the season contain an anime original story arc called 'Z's Ambition', serving as a prologue to One Piece Film: Z.
• The season originally aired on Fuji Television from October 2, 2011 to December 23, 2012.