Plesiosaur


 * For the creature of Golden Lion Pirates with the same name, see Kubinagaryu.

The plesiosaur is the sea monster that did Ganzack's bidding. As its name suggested, it was a massive plesiosaur. The monster wore a helmet on its head.

Upon the Straw Hats' first encounter with the beast, it kidnapped Nami despite Luffy's attempt to eat it. Later, it assisted Ganzack in his battle against Luffy. The monster was finally defeated by the islanders who hurled dynamite at it, sinking Ganzack's ship in the process.

Trivia

 * The word "Kubinagaryu" literally translates to "long-necked dragon".