Fish-Man Karate

Fishman Karate (魚人空手) is a martial art that is practiced by certain skilled members of the Fishman race. While deadly on land, Fishman Karate has a number of devastating underwater moves designed to be suitable with the Fishmen strength and speed while under water. This fighting style emphasizes the fishman's greater power and mobility underwater. This martial art can be learned at Fishman Island.

First Appearance: Chapter 84; Episode 39

Known Practitioners

 * Kuroobi, officer of the Arlong Pirates
 * Kapoty, member of the Foxy Pirates
 * Tansui, member of the Macro Fishman Pirates
 * Jinbei, member of the Shichibukai

Kuroobi's moves
Kuroobi claimed that he is a level 40 practitioner of this martial art style.
 * Hyakumaigawara Seiken (百枚瓦正拳): A hard punch that can send an opponent flying. Kuroobi claims that this attack is so strong that it can break through 100 tiles.
 * Wantou Giri (腕刀斬り): Kuroobi slams his arm-fin into the back of his opponent's neck.
 * Itomaki Kumite (イトマキ組手): Done underwater, Kuroobi wraps his pony-tail around the opponent's waist to prevent them for escaping. The word "Itomaki" means "Manta Ray" but it can also mean "spool of thread" which is what his opponent looks like when they’re caught by this attack.
 * Kaisoku: Harakudashigeri (海速　腹下し蹴り): An underwater attack, Kuroobi darts forward and uses that momentum to deliver a savage side kick to the opponent's stomach. This attack's name is a major pun, the word "Kaisoku" with different Kanji can mean "high speed", the term "Harakudashi" meaning "drop of the stomach" is also the word for "laxative", and finally the word "Geri" is one of many ways of writing "kick", however this version cam also mean "diarrhea". Put them all together and you get "High speed, laxative induced diarrhea".
 * Ka Ka Kakato Otoshi (火華カカト落とし): Done underwater, Kuroobi spins then hits his opponent with the heel of his foot.
 * Kachiage Haisoku (カチ上げ背足): Done underwater, an inner-sole kick to the chin of Kuroobi's opponent.
 * Joudan Bakushou (上段爆掌): Done underwater, An open plam attack to the chin of Kuroobi's opponent. "Joudan" here is written with the characters for "high rank", but is a homophone for the word for "joke".
 * Appakushi Chokka Kouro (圧迫死直下航路): Done underwater, Kuroobi grabs his opponent then swims extremely fast to the ocean floor where the pressure of the ocean wreaks havoc on the opponent's body.
 * Senmaigawara Seiken (千枚瓦正拳): A much stronger version of the Hyaku Maigawara Seiken, Kuroobi claims that this move is the "true essence of Fishman Karate", can break through 1000 tiles, and kill a human with one shot. Sadly we never get to see if he’s telling the truth.

Kapoty's moves
During the Donut Race portion of the Davy Back Fight, Kapoty showed some of his skills in Fishman Karate in order to aid the Cutie Wagon in racing. The techniques he used are as follows:
 * Kaimen Wari (海面割り): Using a karate chop, Kapoty can split the very ocean itself in order to send a shockwave to attack an enemy. This was first seen being used to attack the Barrel Tiger in the Donut Race of the Davy Back Fight.
 * Two Fish Engine (魚々人泳法 (ツーフィッシュエンジン)): Combining himself with Monda by placing himself in the star shark's mouth, Kapoty can create a faster "engine" for the Cutie Wagon. With this, Kapoty and Monda can pull the Cutie Wagon more easily through raging currents. Apparently Monda's sharp teeth don't hurt Kapoty. This was first seen being used after they and Porche realized that they couldn't move through the corral reef easily and were losing to the Barrel Tiger When written in Kanji, the attack means "Fish-fishman Swimming Method".

Jinbei's moves
As a Shichibukai member, Jinbei is a very high-level master of the Fishman Karate style.
 * Karakusagawara Seiken (唐草瓦正拳): Jinbei punches at a fair distance from the intended target(s), so instead of the fist connecting, it releases a shock wave that sends them flying. This move is very similar to Kuma's Pad Cannon with the only difference is that the shock-waves aren't concentrated upon being released; but in exchange, it has a much wider area of effect. This move has a delayed effect, as the shock wave takes a while to affect the opponent(s). This move was first shown against some Impel Down jailers.
 * Gosenmaigawara Seiken (五千枚瓦正拳): A much stronger version of the Senmaigawara Seiken. It is a very powerful punch, able to knock out a Demon Guard in one strike. It is used like an uppercut, rather than a straight punch, sending the opponent flying skywards. It was first used against Minorhinoceros, in Level 4 of Impel Down. Considering the name, it is possible this attack is fifty times stronger then Kuroobi's Hyakumaigawara Seiken and five times stronger then his Senmaigawara Seiken, and as such, break through five thousand tiles.
 * Gyojin Jujutsu: Mizugokoro (魚人柔術 水心): An underwater technique that Jinbei initiates by first performing a bowl-shaped gesture with his webbed hands (one hand over the other) while underwater; this allows Jinbei to physically grab and redirect currents as if he were manipulating cloth. This move was first used within Impel Down's exterior bay in preparation for the Kairyuu Ippon-Seoi.
 * Kairyuu Ippon-Seoi (海流一本背負い): An underwater technique performed after Mizugokoro. Jinbei heaves the current upward, where it erupts from the ocean surface as a towering stream of water. This was first seen used in Impel Down's exterior bay in order to lift a makeshift raft onto a Marine battleship. Jinbei could apparently generate multiple water streams like these if necessary. Ippon-Seoi is a jujutsu move where an opponent is thrown over the shoulder.


 * Yarinami (槍波): A technique used on a body of water's surface. Jinbei heaves a spear-shaped burst of water with enough force to punch a hole in solid structures. This was first used against the Marines on board a battleship, dealing a fair amount of damage to the ship itself.

Trivia

 * Tansui's level of Fishman karate is never seen because he was taken out before he could do anything.
 * All practitioners of this art seen so far are pirates.