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For other uses, see Zou (Disambiguation).

The Zou Zou no Mi, Model: Mammoth[3] is an Ancient Zoan-type Devil Fruit,[4] which allows the user to transform into a mammoth hybrid and full mammoth at will. It was eaten by Jack.[3]


  • "Zou" ( ?) means "elephant".

Strengths and Weaknesses

Jack levels several buildings with a swing of his trunk.

This fruit allows the user to transform in full or hybrid mammoth at will, while in full mammoth form granted by this fruit gives the user a massive frame, significantly increasing Jack's already abnormal size. Jack can level buildings with a single swing of his trunk[5] and leave imprints of his feet on the ground just by stepping on it.[6] The human-beast form grants the user a centaur-like body with four mammoth legs, a peculiar case for zoan users, with the upper body of a human (or a fish-man in Jack's case) with the head, trunk, and tusks of a mammoth.[7]

However, the user is extremely heavy and slow in this form, leaving them unable to dodge high-speed attacks.[8] Otherwise, the user is affected by the standard Devil Fruit weaknesses.


Jack has used this fruit to improve his combat capabilities; he can cause massive destruction with a single attack and bulldoze nearly anything that gets in his way by charging forward. So far, his only displayed attack has been swinging his trunk to damage his opponents and surroundings.[5]

Due to being a fish-man,[3] Jack can remain conscious and breathe underwater for an indefinite amount of time, although remaining unable to move in the meanwhile.[9]



  1. One Piece Official YouTube Channel
  2. One Piece Manga and Anime — Vol. 81 Chapter 807 (p. 17) and Episode 757, Jack's mammoth form first appears.
  3. 3.0 3.1 3.2 Vivre Card - One Piece Visual Dictionary (Card #0960), Jack's Devil Fruit is named.
  4. One Piece Manga and Anime — Vol. 81 Chapter 810 (p. 3) and Episode 759, Nekomamushi confirms that Jack possesses an ancient form of the Zou Zou no Mi.
  5. 5.0 5.1 One Piece Manga and Anime — Vol. 81 Chapter 808 (p. 8-9) and Episode 757, Jack levels several buildings with a swing of his trunk.
  6. One Piece Manga and Anime — Vol. 80 Chapter 805 (p. 16) and Episode 754, The Straw Hats notice giant foot-shaped imprints in the ground where Jack invaded Zou.
  7. One Piece Manga — Chapter 1023 (p. 11-12).
  8. One Piece Manga and Anime — Vol. 81 Chapter 809 (p. 17-19) and Episode 759, Nekomamushi grabs Jack by the trunk and bodyslams him before the latter can react.
  9. One Piece Manga and Anime — Vol. 82 Chapter 824 (p. 9) and Episode 779, Jack remains unconscious underwater but is unable to move due to his Devil Fruit powers.

External Links

  • Mammoth – Wikipedia article about mammoths.

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