Kuroobi

Seiyuu: Hisao Egawa

Kuroobi (クロオビ, Kuroobi) is a stingray-type fish-man. Kuroobi is one of the strictest members in his crew and has always been wary of Nami's supposed allegiance to Arlong. Kuroobi practices "Fishman Karate" (called "Merman Karate" in the English version) to fight his opponents. During the battle with the Straw Hats in the Arlong arc, he fights against Sanji whom he nearly defeats when the cook goes underwater to try and save Luffy. As a Fish-Man, Kuroobi has an advantage underwater. However, Sanji manages to force him up to dry land by blowing air into his gills and then promptly beats him into submission with his kicks. Kuroobi states his ultimate technique is "The Thousand Brick Fist." It is unknown actually how strong this punch is, as Sanji beats Kuroobi into submission before Kuroobi actually executed the move.