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Kuroobi is a ray fishman, an officer of the Arlong Pirates[2], and a former member of the Sun Pirates.[3] He is one of the major antagonists of the Arlong Park Arc.


Kuroobi has the typical appearance of a martial artist with a dark blue gi, a black belt, and his hair is tied into a straight ponytail. His Sun Pirates tattoo is on the right side of his chest.[1] Whether this tattoo does or does not cover a slave mark is currently unknown.

Fifteen years ago, when he was part of the Sun Pirates, his hair was afro-like.[3]


Kuroobi as child
Kuroobi as a child.


Kuroobi is one of the strictest members in his crew and has always been wary of Nami's supposed allegiance to Arlong.

Kuroobi’s attitude is similar to his captain as he loathes all humans but doesn't share Arlong's care for Nami and dislikes and distrusts the navigator, he even searched her room for evidence he could use against her. Kuroobi does have respect for other people strength as seen with Arlong though he did complement Sanji's strength saying he's above "average human" but still mocked the cook for throwing his life away for "one girl". Kuroobi is very cruel and unforgiving, seen when he sliced up Genzo for protecting Bell-mere and for trying to rescue Nami and later he mocked Sanji saying he was too "weak" to protect Nami and his friends (though Sanji proved this wrong by beating him)

Kuroobi will take every advantage he can get in battle. During the Arlong Park battle, he punched Sanji through a wall when the latter wasn't focusing on the fight and tried to attack a weakened Zoro from behind. Kuroobi took advantage of Sanji’s attempt to save Luffy by diving into the sea and promptly tortured the cook underwater, due to his fishman-enhanced ability while submerged. When Sanji turned the battle around by beating the karate fishman into a pulp, Kuroobi was so furious he couldn't see straight, cursing the cook before being taken out. 

Abilities and PowersEdit

As a fishman, Kuroobi possesses great strength. As one of Arlong's direct subordinates, he holds great authority over his crew.

Fishman KarateEdit

Main article: Fishman Karate

Kuroobi practices Fishman Karate to fight his opponents. He is a level 40 practitioner of this martial art, causing great injury to Sanji in their battle. As a fishman, Kuroobi has an advantage underwater. Kuroobi states his ultimate technique is Senmaigawara Seiken but it is unknown actually how strong this punch is, as Sanji beat Kuroobi into submission before Kuroobi actually executed the move.


He is also an adept swordsman. Eight years ago, when Arlong was about to kill Bell-mère and abduct Nami, Kuroobi blocked the bullets from Genzo and swiftly slashed his body with a cutlass.



Kuroobi Sun Pirates Portrait

Kuroobi as a member of the Sun Pirates.

Kuroobi, Chew, and Hatchan planned to open a takoyaki store when they were younger. At some point, they had given up this dream to become members of the Arlong Pirates. After Fisher Tiger attacked Mariejois and formed the Sun Pirates, the Arlong Pirates integrated with Tiger's crew. During their time roaming the Grand Line, the Sun Pirates battled numerous Marines. One day a former human slave named Koala boarded their ship to return to her home in Foolshout Island. After returning her to her home, the Sun Pirates were ambushed by the Marines. They lost their ship and Tiger was badly wounded during the battle. Tiger soon died from his wounds and Arlong was later captured. Kuroobi was then under the command of Jinbe. One day, Jinbe received an invitation to join the Shichibukai. After Jinbe accepted the position, Arlong was released.

When the Sun Pirates split up, Kuroobi went with Arlong's crew. The Arlong Pirates then head for East Blue. At the arrival of the Arlong Pirates to Konomi Island, Kuroobi was following orders of his captain, Arlong, by wreaking havoc in the island and raiding its towns. The Arlong Pirates then took over Nami's village, killing Bell-mère in the process. During the the raid in Nami's house, he was the one who cut Genzo, giving him the scars he has in the present time.

Arlong Park ArcEdit

Destruction of Arlong ParkEdit

The Arlong Pirates briefly had Zoro imprisoned until Nami freed him when they weren't looking. After Chew dragged Usopp to Arlong Park, Kuroobi questioned Nami's loyalty. showing everybody a map to the village from her room, Nami was angry he took her belongings. After Nami supposedly stabbed Usopp and push him into the pool were they though he drowned, Kuroobi apologized to Nami for doubting her.[5]

As one of Arlong's officers, Kuroobi aids Chew and Hachi in defeating the contingent of Marines from Naval Base 77.[6]


Kuroobi being beaten by Sanji.

During the battle with the Straw Hats at Arlong Park, he fights against Sanji.[7] After a strong blow from Kuroobi that he announced was fishmen Karate, Sanji could only smirk and laugh. He told Kuroobi his attacks were nothing compared to Zeff's kicks.[8] Kuroobi nearly defeats him when the cook headed underwater to save Luffy. During the battle, Kuroobi taunts Sanji about his chivalry saying he won't be able to protect his "girlfriend" (Nami) and rest of his friends, stating to the drowning Sanji that he will "kill all of them". Sanji manages to force Kuroobi up to dry land by blowing air into his gills.[9]

Once out of water, Sanji yells to Kuroobi "Get your ass up here , I want to fight were I can breathe" but Kuroobi was confident he could still beat Sanji even on land. But having enraged the cook with his taunts, Sanji promptly beat Kuroobi into submission with his kicks, not giving the fishman any time to counter attack. Ultimately ending with Sanji kicking Kuroobi into and through Arlong Park, where he laid defeated on the other side of the building.[10]

Kuroobi was later arrested along with the entire crew, though his fellow crewmember Hatchan later escaped.[11]

Major BattlesEdit


Video GamesEdit

Playable AppearancesEdit

Enemy AppearancesEdit

Support AppearancesEdit

Non-Playable AppearancesEdit


  • Kuroobi (黒帯?) means "black belt".
  • Kuroobi was the only fishman who distrusted and disliked Nami, his suspicions were proven true when Nami refused to join Arlong again when he requested.
  • Kuroobi was the first fishman martial artist shown in One Piece, the second being Jinbe


  1. 1.0 1.1 One Piece Manga and Anime — Vol. 8 Chapter 69 (p. 13) and Episode 31, Kuroobi makes his debut, but isn't formally introduced.
  2. 2.0 2.1 2.2 One Piece Manga and Anime — Vol. 9 Chapter 75 (p. 12) and Episode 34, Kuroobi is introduced.
  3. 3.0 3.1 3.2 One Piece Manga and Anime — Vol. 63 Chapter 620 (p. 17) and Episode 541, Kuroobi's tenure in Sun Pirates
  4. One Piece Blue Deep: Characters World (p. 54), His birthday is revealed.
  5. One Piece Manga — Vol. 9 Chapter 74.
  6. One Piece Manga — Vol. 9 Chapter 75.
  7. One Piece Manga — Vol. 10 Chapter 83.
  8. One Piece Manga — Vol. 10 Chapter 84.
  9. One Piece Manga — Vol. 10 Chapter 86.
  10. One Piece Manga — Vol. 10 Chapter 87.
  11. One Piece Manga and Anime — Vol. 51 Chapter 492 (p. 13) and Episode 387, Hatchan mentions Arlong and the crew's fate.

Site NavigationEdit

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Arlong Pirates
Members: Arlong  •  Hatchan  •  Chew  •  Kuroobi  •  Nami   •  Kaneshiro  •  Pisaro  •  Take  •  Shioyaki  •  Mohmoo
Ship(s): Shark Superb
Weapon Based: Kiribachi  •  Rokutoryu
Fighting Style Based: Fishman Karate
Related Articles
Story Arcs: Arlong Park Arc  •  Fishman Island Arc
Specials: Take Aim! The Pirate Baseball King  •  Episode of Nami  •  Episode of East Blue
Locations: Arlong Park
Others: Fishmen  •  Sun Pirates
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Sun Pirates
Members: Aladine  •  Wadatsumi  •  Charlotte Praline
Former Members: Fisher Tiger   •  Jinbe  •  Arlong Pirates (Arlong  •  Hatchan  •  Chew  •  Kuroobi  •  Kaneshiro  •  Pisaro)  •  Macro Pirates (Macro  •  Gyaro  •  Tansui)
Allies and Affiliates: Koala   •  Shichibukai   •  Big Mom Pirates *  •  Sanji Retrieval Team   •  Fire Tank Pirates 
Weapon Based: Kiribachi  •  Rokutoryu
Fighting Style Based: Fishman Karate (Fishman Jujutsu)  •  Busoshoku Haki
Related Articles
Story Arcs: Arlong Park Arc  •  Amazon Lily Arc  •  Impel Down Arc  •  Marineford Arc  •  Post-War Arc  •  Fishman Island Arc  •  Whole Cake Island Arc
Cover Stories: Solo Journey of Jinbe, Knight of the Sea
Location(s): Fishman Island  •  Totto Land
Others: Fishmen  •  Merfolk  •  New Fishman Pirates  •  Slavery
[v · e · ?]
Fishman Island
Fishmen: Arlong  •  Hatchan  •  Chew  •  Kuroobi  •  Pisaro  •  Kaneshiro  •  Take  •  Shioyaki  •  Octopako  •  Jinbe  •  Hammond  •  Kasagoba  •  Hody Jones  •  Fisher Tiger  •  Ammo Knights  •  Dosun  •  Zeo  •  Daruma  •  Ikaros Much  •  Harisenbon  •  Junan  •  Papaneel  •  Togare  •  Gotan  •  Nuru  •  Tom  •  Hack
Merfolk: Keimi  •  Hyouzou  •  Medaka Mermaid Quintuplets  •  Ishilly  •  Kairen  •  Hiramera  •  Seira  •  Mero  •  Lulis  •  Adele  •  Fillonce  •  Sora  •  Fukaboshi  •  Ryuboshi  •  Manboshi  •  Shyarly  •  Neptune  •  Minister of the Right  •  Minister of the Left  •  Shirahoshi  •  Den  •  Aladdin  •  Otohime  •  Maria Napole  •  Luca  •  Meverly  •  Garcia
Animals: Pappug  •  Hoe  •  Megalo  •  Surume  •  Daidalos
Fighting Style Based: Haki  •  Fishman Karate (Fishman Jujutsu)  •  Merman Combat  •  Merman Gujutsu
Weapon Based: Rokutoryu  •  Kiribachi  •  Hattoryu  •  Kirisame
Others: Energy Steroid  •  Bubbly Coral  •  Voice of All Things
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Story Arc(s): Fishman Island Arc  •  Whole Cake Island Arc  •  Reverie Arc
Locations: Ryugu Kingdom  •  Ryugu Palace  •  Mermaid Cove  •  Coral Hill (Mermaid Cafe)  •  Gyoverly Hills  •  Sea Forest  •  Criminal Brand Company  •  Fishman District  •  Fishman Karate Dojo  •  Candy Factory  •  Gyoncorde Plaza  •  John's Candies Shop
Ship(s): Noah  •  Ryugu
Organizations: Shichibukai  •  Sun Pirates  •  Arlong Pirates  •  Macro Pirates  •  New Fishman Pirates  •  Flying Pirates  •  Big Mom Pirates  •  Whitebeard Pirates
Others: Slavery  •  Edward Newgate  •  Charlotte Linlin  •  Tamatebako *  •  Mermaid Princess (Poseidon)  •  Reverie