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Mohmoo Anime Infobox

Japanese Name: モーム
Romanized Name: Mōmu
English Name: Momoo
Debut: Chapter 73; Episode 31[1]
Affiliations: Arlong Pirates (former);[2] Caribou Pirates (former); Impostor Straw Hat Pirates (former)
Occupations: Arlong Pirates' pet (former);[2] Caribou Pirates' steed (former)
Birthday: April 9th[3]
Japanese VA: Takahiro Fujimoto
4Kids English VA: Unknown
Funi English VA: Cris George

Mohmoo is a giant sea cow from the Grand Line.[4]


Mohmoo is a giant sea cow. He has a big round nose with a gold nose ring, cow-esque face and horns, green spots throughout his body,[2] and also, due to his seal-like structure, he has an ability to swim easily.[1]


Even being gigantic, he behaves cowardly, but he is very obedient to whoever controls him. He almost cried when he was ordered to fight the Straw Hats at Arlong Park, but he was warned by Arlong, which made him attack the Straw Hats.[5] His behavior has not changed even after two years. After seeing the Straw Hats again during the journey to Fishman Island, he quickly fled in terror, but the Caribou Pirates easily forced him to turn back by giving him a lump on the head.

Abilities and PowersEdit

Not much is known about his abilities, but he has a huge appetite that can scare away people.[6]


Arlong Park ArcEdit

Some time before his encounter with the Straw Hats, Mohmoo destroyed Gosa Village.[7]

Sanji Tries to Feed Mohmoo

Sanji tries to feed Mohmoo.

When he met Monkey D. Luffy, Sanji and Yosaku, Sanji tried to feed him, but suddenly, Sanji promptly beat him up [8] and used him to tow their boat to the island.[9]

Later, during the battle at Arlong Park, he was called upon by Hatchan (his caregiver) to fight the Straw Hat Pirates.[10] The other crew members of Arlong pirates got their lead by Mohmoo.[11]

He was initially scared to face Luffy due to the previous incident and almost forfeited the battle. But, being taunted by Arlong, he tried to attack Luffy, only to be used in his Gomu Gomu no Kazaguruma, where Luffy spun Mohmoo around the area, taking out most of Arlong's forces, and then Mohmoo himself was thrown out of Arlong Park and in the process was knocked unconscious [12] making the people watching this astonished.[13]

Two Years LaterEdit

Fishman Island ArcEdit

Sometime after the events at Arlong Park, Mohmoo wandered into the waters near Sabaody Archipelago where he was captured by the Caribou Pirates. They use him as a means of advanced sea navigation. By putting a collar around his neck they could use it as a harness and hook it to the front of the ship, allowing him to pull them.

Nami Recognizes Mohmoo

Nami recognizes Mohmoo.

After moving the Caribou Pirates' ship close to the Thousand Sunny, Mohmoo recognizes Nami, Sanji, and Luffy. He gets scared and swims away, pulling the ship with him and leaving Caribou alone on the Thousand Sunny with the Straw Hat Pirates.[14]

Mohmoo later returns at full speed pulling Caribou's ship with another lump on his head. When the Kraken destroys the ship, Mohmoo is freed from the Caribou Pirates' control and swims away.[15]


  • While Mohmoo resembles a Sea King, he is actually just a giant sea dwelling mammal.[16]


  1. 1.0 1.1 One Piece Manga and Anime — Vol. 9 Chapter 73 (p. 3) and Episode 33, Mohmoo makes his debut shadowed as Hatchan his caregiver calls upon him.
  2. 2.0 2.1 2.2 One Piece Manga and Anime — Vol. 9 Chapter 73 (p. 6) and Episode 32, Mohmoo is formally introduced.
  3. One Piece Blue Deep: Characters World (p. 179), His birthday is revealed.
  4. One Piece Manga and Anime — Vol. 9 Chapter 73 (p. 7) and Episode 32, Yosaku reveals Mohmoo's origin.
  5. One Piece Manga and Anime — Vol. 10 Chapter 82 (p. 10-12) and Episode 38, Mohmoo shows his cowardice as he sees Luffy and Sanji, and then Arlong.
  6. One Piece Manga — Vol. 8 Chapter 70, Mohmoo's appetite is commented by villagers.
  7. One Piece Manga and Anime — Vol. 8 Chapter 70 (p. 15) and Episode 32, Mohmoo is said to have destroyed Gosa Village.
  8. One Piece Manga and Anime — Vol. 9 Chapter 73 (p. 6-13) and Episode 38, Mohmoo is hit by both Luffy and Sanji.
  9. One Piece Manga and Anime — Vol. 9 Chapter 73 (p. 6-13) and Episode 38, Mohmoo is used by Luffy's group to tow them to Arlong Park.
  10. One Piece Manga and Anime — Vol. 10 Chapter 82 (p. 9-10) and Episode 38, Mohmoo arrives as called upon by Hatchan, his caregiver.
  11. One Piece Manga and Anime — Vol. 10 Chapter 82 (p. 13) and Episode 38, Arlong's crewmates follow suit.
  12. One Piece Manga and Anime — Vol. 10 Chapter 82 (p. 11-19) and Episode 38, Luffy defeats Mohmoo and Arlong's subordinates at the same time.
  13. One Piece Manga and Anime — Vol. 10 Chapter 83 (p. 2) and Episode 38, The Cocoyasi villagers watch Mohmoo's defeat astonished.
  14. One Piece Manga and Anime — Vol. 62 Chapter 604 (p. 3-8) and Episode 524, Mohmoo returns as the Caribou Pirates' advanced sea navigation.
  15. One Piece Manga and Anime — Vol. 62 Chapter 605 (p. 5) and Episode 524, Mohmoo escapes as the kraken crushes the ship.
  16. SBS One Piece MangaVol. 17, Fan question: Is Mohmoo a Sea King?

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