"Boom! Boom! Boom...!"

Isobu opened his mouth wide and fired multiple Suiton: Suiryūdan no Jutsu (Water Style: Water Dragon Bullet)–like projectiles, which crashed heavily into the bald sea monster in the distance.

The tremendous force knocked the bald sea monster several steps back, almost toppling him to the seabed.

"Zababababa...!" the bald sea monster cried out strangely. "Captain Vander! That turtle is shooting water like cannonballs! It hurts so much!"

But Vander Decken IX didn't care. Instead, he spread his arms wide and laughed maniacally.

"So what? This is ten thousand meters below sea level—our fishmen's territory!"

"If we kill this beast, maybe Neptune will marry Shirahoshi to me... Then I'll become King of Fishman Island!"

"Hahaha! Bald Sea Monster, go! You and the North Sea Kraken—kill that creature for me!"

The bald sea monster looked foolish but believed it, and excitedly stomped forward.

"Zababa... just need to crack this turtle shell open..."

But at this moment, Isobu was already completely enraged.

While he ranked lower among the nine Bijū, that was only relative. In any body of water, he feared no beast.

Yet here he was, being beaten up by Sea Kings.

"ROAR!!"

With a furious roar, Isobu swung his three spiked tails violently, slamming them into the tentacles of the North Sea Kraken.

The spikes pierced clean through, causing the kraken to shriek in agony.

But it too retaliated, showing terrifying strength by grabbing Isobu and slamming him toward a deep-sea volcano.

Isobu burst with powerful chakra and forcibly halted his momentum within the current.

Facing the two Sea Kings charging at him, Isobu roared again and bit down hard on the kraken's tentacle—ripping it clean off.

His three tails swung like meteor hammers, pounding the bald sea monster, knocking him back several steps and flat onto the seabed.

The three colossal beings began a brutal bloodbath beneath the sea.

The waters turned red with the blood of the North Sea Kraken and the bald sea monster. Faced with Isobu's indestructible shell, terror filled their eyes.

"Zababa... Captain Vander! It's no good! That shell is too hard! My fists hurt so bad...!"

The bald sea monster tearfully looked at his own fists. After smashing them into Isobu's shell a few times, his bones nearly cracked.

The kraken also let out a frightened cry.

Despite its endless blows, not even a single crack formed on Isobu's shell.

Instead, its own tentacles had already been bitten off several times.

"Damn it!" roared Vander Decken IX, a tiger shark fishman with four legs, glaring at the rampaging Isobu.

"Where the hell is this Sea King from? Why is its defense so strong!?"

He ordered his men to open fire, but the cannonballs did nothing—not even scratching the shell.

"Ah...!" Vander looked at his own right hand with regret and intoxication, sniffing it with a smirk. "No choice. I'll have to handle this myself. What a shame... this hand once touched Shirahoshi's..."

He was a target-target man who ate the Mato Mato no Mi.

As long as he touched someone with his right hand, anything he threw would chase them to the ends of the earth.

Years ago, he touched Princess Shirahoshi's hand—and had been throwing objects to harass her ever since.

"But if I can kill the Demon Child Uzumaki Naruto, Neptune will surely give Shirahoshi to me..."

He laughed weirdly, coated himself with bubble film, and swiftly swam to land on Isobu's shell.

"Hohoho, little turtle, let me mark you real quick..."

Vander sneered as he placed his right hand on the shell.

Just as he was about to swim back, he suddenly sensed something was off.

"What's going on!?"

Though he had eaten a Devil Fruit, he was still a fishman and could instinctively detect shifts in the ocean currents.

But now, the currents had changed.

And then he saw it.

Inside Isobu's mouth—a blond-haired youth appeared.

"Suiton: Suiryūdan no Jutsu! (Water Style: Water Dragon Bullet!)"

In an instant, the surrounding water coalesced unnaturally—forming a ferocious water dragon within the sea.

The dragon roared and surged straight toward him.

"AAAHHHH!!!"

Vander Decken IX let out a heart-wrenching scream.

The membrane coating his body was instantly shattered, and the water dragon crushed most of his bones.

If he weren't a fishman, the water pressure alone would have killed him instantly at this depth.

The bald sea monster quickly rushed over and caught him.

"Zababa! Captain Vander, are you alright!?"

But Vander couldn't speak. Blood poured from his mouth as he was carried back to the ship.

The battle continued, but now even more fishmen arrived, using Fishman Karate to assault Isobu one after another.

Despite Isobu's iron water cannon, it was ineffective—these fishmen could control the ocean currents too.

Naruto frowned and shook his head. "Still my weakness... if only I had water affinity. Then this would be my domain."

Trying to use Suiton without the water chakra nature severely limited his power.

Seeing Isobu start to struggle, Naruto smirked slightly and pulled out a special kunai.

"Perfect... time to test it."

He took a deep breath and vanished from Isobu's mouth.

Nami and Robin gasped in shock.

But in the next instant, Naruto reappeared inside Isobu's mouth—his face a little pale, but now he wasn't alone.

Beside him stood a tall, voluptuous woman with long brown hair, wearing a blue Mizukage robe and hat.

It was none other than the Fifth Mizukage of Kirigakure—Mei.

Mei looked bewildered.

She had been sitting in the Mizukage office processing documents when suddenly Naruto appeared and hugged her.

She thought he was about to do something inappropriate—but then they suddenly arrived in the deep ocean.

"Naruto-dono, where... are we?" Mei looked around in shock.

She was inside Isobu's mouth. And Isobu was in the deep sea.

Across from them were legendary fishmen, massive sea creatures, and even mythical mermaids...

"Where is this? Some hidden village human experiment!?"

While Mei was still dazed, Naruto patted her shoulder, pale-faced, pointed outside, and grinned:

"Come on. Time to wipe out those guys. After all... this is your domain, Mizukage."

(End of Chapter)

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