You’re sailing through the Second Sea, dodging aggressive sea beasts and trying not to get sniped by a high-level Bounty Hunter, when you realize your ship looks like it’s been through a blender. It’s annoying. Most players just reset their character or buy a new boat, but if you're trying to keep a specific ship or you're just low on fragments, you start looking for the Submarine Worker Blox Fruits NPC.
He’s not some legendary boss. He won't give you a mythical fruit.
Honestly, he’s just a guy standing by the water. But in the grand scheme of the Second Sea grind, he’s one of those utility NPCs that separates the pros from the people who constantly drown because their wooden plank gave out in the middle of the ocean.
Where is the Submarine Worker actually hiding?
If you're looking for him, head to the Kingdom of Rose. This is the main hub of the Second Sea, and most of the action happens around the Mansion or the Cafe. However, the Submarine Worker hangs out near the docks. Specifically, you’ll find him standing on the pier near the ship dealer. He’s wearing a bright yellow diving suit, so he’s pretty hard to miss unless you’re just dashing past at Mach speed with Mink v4.
He doesn't have a flashy quest marker.
Basically, his entire existence is dedicated to one thing: repairing ships. If your boat has taken damage from cannon fire or those annoying NPCs that shoot at you from the shore, he’ll patch it up for a price. It’s a simple interaction. You talk to him, he asks for some money (Beli), and your ship’s health bar goes back to full.
Is it worth paying him?
That depends. If you’re using a basic "Dinghy" or a cheap "Sloop," paying for repairs is a total waste of Beli. You could just spawn a new one for free or a tiny fee. But if you’ve spent your hard-earned Robux or a massive amount of Beli on a high-tier ship like the Sentinel, the Guardian, or especially the Beast Hunter ship, you aren't going to want to just "let it sink."
The Submarine Worker Blox Fruits utility becomes obvious when you’re preparing for long-distance voyages.
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Sea Events are the lifeblood of the Second and Third Seas. If you’re planning on hunting the Terrorshark or just grinding Sea Beasts for money and fragments, starting with a 100% health ship is mandatory. There’s nothing worse than getting halfway to the outer edges of the map only to realize your ship is at 20% health because you were too lazy to stop at the docks.
The Connection to the Submarine and the Cyborg Race
Now, this is where players get a bit confused. There is a "Submarine" vehicle in the game, but the Submarine Worker isn't the one who sells it. You get that from the regular Ship Dealer if you have the Beli.
The real "Submarine" lore in Blox Fruits usually circles back to the Law Raid and the Cyborg race.
To get the Cyborg race, you have to deal with the Order boss (Law) in the hot and cold area. Many people think the Submarine Worker has something to do with the "Core Brain" or the "Fist of Darkness" because of his aesthetic. He doesn't. He is purely a maintenance NPC. If you're looking to change your race or upgrade to v2 or v3, you need to be talking to Alchemist or Arowe, not the guy in the yellow suit.
Don't let the name fool you into thinking he's part of a secret questline.
I’ve seen plenty of theories on Discord suggesting he’ll eventually be part of a "Submarine Upgrade" quest. As of the current update, that’s just speculation. He’s a blue-collar worker in a world filled with gods and fruit-users. He just fixes boats.
Why ship health is a bigger deal than you think
In the First Sea, ships are basically disposable. You use them to get from Pirate Village to Marineford, and that's it. But once you hit the Second Sea, the ocean becomes hostile.
Rough waters damage your ship over time.
If you're trying to reach the Shipwright NPC or engage in the Ship Raid event, your boat is your lifeline. If your boat dies, and you have a fruit like Magma or Buddha that hasn't been awakened to "walk on water," you are effectively dead in the water. Literally.
Using the Submarine Worker Blox Fruits service is a preventative measure.
- Sea Beast Hunting: These things have high DPS. If you start the fight with a damaged ship, you'll sink before the Beast even hits half health.
- Traveling to Remote Islands: Places like the Cursed Ship or the Ice Castle are long hauls.
- Avoiding the "Reset" Penalty: If you lose your ship and have to reset or swim, you might lose your combat streak or just waste valuable grinding time.
Common Misconceptions about the Submarine Worker
Let’s clear some things up because the wiki and various YouTube "guides" can be a bit messy.
First off, he doesn't work in the Third Sea. If you’re at Turtle Island or the Castle on the Sea, you won’t find him. The Third Sea has its own mechanics for ship maintenance, often tied to the Shipwright teacher or specific sub-classes you can take. The Submarine Worker is very much a Second Sea fixture.
Secondly, he doesn't sell diving gear.
Some players think that talking to him will let them breathe underwater or give them an advantage against Sharkmen. Nope. If you want to breathe underwater, you either need to be the Shark race or use specific accessories like the Pilot Helmet (for speed to get out of water) or just... not fall in.
He’s also not involved in the "Leviathan" hunt. That’s a common question. People think because he’s a "Submarine Worker," he might know how to find the Leviathan or help repair the specific ships used for that hunt. While he can repair the ships used for the hunt if you bring them back to the docks, he doesn't provide any special buffs for that specific boss fight.
How to optimize your Beli when using his services
Don't just blindly click "Repair."
Check your ship’s health bar first. If it's above 80%, you’re probably fine for another trip. The repair cost scales based on the value of the ship and how much damage it has taken. If you’re rocking a basic boat, it’s almost always cheaper to just delete the boat (by spawning a new one) than to pay for repairs.
But let's say you're a serious player.
You’ve got the "Fast Boats" gamepass. You’re using the Enforcer or the Striker. In that case, the Submarine Worker is your best friend. Those boats are fast, but they aren't always the sturdiest. A quick stop at the Kingdom of Rose docks to top off your health is a smart move before you head out to find the Graveyard or the Snow Mountain.
Actionable Insights for Your Next Session
If you want to make the most of your time in the Second Sea, keep these points in mind regarding ship maintenance and the Submarine Worker:
- Pin the Location: Remember he is at the Kingdom of Rose docks, right next to the Ship Dealer. If you can't see him, look for the yellow suit.
- Health Check: Always check your ship's HP before leaving a safe zone. If you're under 50% health, pay the Beli. It's cheaper than losing a Sea Beast drop because your boat sank.
- Ship Choice Matters: If you find yourself visiting the Submarine Worker too often, consider switching to a ship with higher durability, even if it’s a bit slower.
- Ignore the Myths: Don't waste time trying to give him special items or clicking on him with a Fist of Darkness. He is a utility NPC, not a quest giver.
- Grind Beli Efficiently: Since repairs cost Beli, make sure you're keeping your wallet full by completing quests in the Kingdom of Rose area. The "Swan Pirates" quest is a quick way to make enough for a dozen repairs.
The Submarine Worker Blox Fruits NPC might be one of the most overlooked characters in the game, but he’s essential for anyone who takes sea exploration seriously. Stop treating your ships like they're disposable and start maintaining them. Your fragments and your sanity will thank you when you aren't stranded in the middle of a dark sea with a broken rudder and a Shark chasing you down.
Next time you're at the docks, take a second to stop by the guy in the yellow suit. It’s a small price to pay for the security of knowing your ship isn't going to fall apart the moment a cannonball grazes the hull.