|Manga - Anime|
|Debut:||Chapter 73; Episode 31|
|Affiliations:||Arlong Pirates (former); Caribou Pirates (former); Impostor Straw Hat Pirates (former)|
|Occupations:||Arlong Pirates' pet (former); Caribou Pirates' steed (former)|
|Japanese VA:||Takahiro Fujimoto|
|4Kids English VA:||Unknown|
|Funi English VA:||Cris George|
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, and also, due to his seal-like structure, he has an ability to swim easily.
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. 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.
Arlong Park ArcEdit
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  making the people watching this astonished.
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.
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.