Sharkman Master - NPC Blox Fruits

The Sharkman Master is the Third Sea NPC who improves the Sharkman Karate fighting style. He sells nothing - you must defeat him in Fish Fights to take his headbands, ranging from white to black, and each headband unlocks the improvement of a move. You need level 2200 and 500 Mastery before you can even start, and losing a Fish Fight costs up to 40 minutes of waiting.

How to get it

He is found inside the Sealed Cavern, near the Coral Pirates, behind a house. He was added in Update 27.2, then moved to the Sealed Cavern in Update 27.3, when he gained his improvement function.

The three improvements

You need a minimum of 500 Mastery in Sharkman Karate, and must have completed a certain number of Fish Fights.

The Sharkman Master, who upgrades Sharkman Karate to V2.

Move	Headband Required	Cost	What It Changes
Z	Headband (Yellow)	2,000 Fragments	Your Z chains with a shark launched in pursuit that always hits.
X	Headband (Blue)	3,000 Fragments	You can move and drag the X's trap bubble while holding the move, and it follows your cursor or finger.
C	Headband (Black)	5,000 Fragments	Your C grants you an additional temporary defense bonus of 35%, indicated by a band of water spinning around you.

The Fish Fights

To start playing against the Sharkman Master, you must first reach level 2200 and have 500 Mastery. You must then defeat him in Fish Fights to obtain the headbands, which range from white to black, each unlocking the improvement of a Sharkman Karate move depending on the headband you wear.

If you fail, you must wait up to 40 minutes before you can try again.

Note: the Fandom mentions a range of headbands from white to black, but only details the conditions for three of them (yellow, blue, black). A purple headband round is also mentioned elsewhere on the page.

Training Tips

On PC, use the spacebar instead of left-click: the delay is lower.
To get critical hits more regularly, hold M1 and release when the cursor reaches the green bar.
Play on a server with good ping to reduce the latency between your action and when it registers.
Practice against other players or on easier headbands before attempting the Headband (Black): it requires a near-perfect critical rate and perfect dodges. With a perfect critical rate, a single perfect dodge is enough.
Work on your reaction speed multiple times before attempting the Headband (Black).
A private server with low ping and low resolution is ideal.
Aim for high framerate, between 120 and 240 FPS: the reaction window is better and the game smoother. Be careful though, very high FPS can increase your ping. The good balance is maximum FPS without degrading your connection, with about 120 FPS and 50 ms ping as a reference.

Things to Know

He is the second NPC in the game capable of improving a V2 fighting style, after Uzoth.
The Deepglow Oarfish appears in the purple headband round as a fish used by the Sharkman Master: it is his only use in the game.
At Dungeon Level 2, and sometimes at one of the floors leading to Zero, both he and the Sharkman Teacher appear with the updated Sharkman Karate, with the Master using the improved version.

Strengths and weaknesses

The only NPC who improves all three Sharkman Karate moves (Z, X, and C)
Second NPC in the game able to improve a V2 fighting style, after Uzoth
Headbands are earned through combat, not by farming materials

Level 2200 and 500 Mastery required before even starting
A failed Fish Fight locks you out for up to 40 minutes
The Headband (Black) requires a near-perfect critical rate
10,000 Fragments total for all three improvements

Update history

NPC : Sharkman Master·Released : Update 27.2

Update 27.3 vers septembre 2025 Adjustment
- Sharkman Master has been relocated inside the Sealed Cavern.
- Sharkman Master can now upgrade Sharkman Karate.
See update 27.3
Update 27.2 vers septembre 2025 Release
- Sharkman Master was released.
See update 27.2