Here is the English translation, with no additions, deletions, or alterations, exactly as you requested:
---
"Hmm, what's the matter!? What do you see!?" asked both Ace and Deis, when they saw the changes in Seth's facial expression as he lowered the binoculars from his eyes and threw them to Deis.
"This is definitely not a coincidence!!..." he thought with a frown. "Their ship's path is heading directly here, which means they discovered that I'm the one who killed the Celestial Dragon!! But how!?, how did they find out..." his mind was full of questions that had no logical answers.
Three days had already passed since the Celestial Dragon was killed, yet the World Government had managed to locate the killer. Seth could only feel fear and terror from the power of the World Government.
Seth ignored both Deis and Ace, who were bombarding him with questions.
"It's better to take the fight to them, rather than let them get close..." Seth muttered gloomily as he prepared to transform.
"Man, what's going on with you!? What are you planning!?" asked Ace as he approached and patted him on the shoulder.
"If I'm not mistaken, that ship belongs to the World Government..." said Deis as he lowered the binoculars and stared at Seth, who nodded, then under their astonished eyes ran quickly to the edge of the ship and jumped into the sea.
"Wait..." shouted Ace, trying to stop him, but to no avail. He and Deis ran to the edge but saw no trace of him.
"Damn! Did he drown..." Ace muttered.
"If I'm not mistaken, that guy Seth has problems with the World Government. He probably committed a crime and is afraid of them..."
Deis analyzed while rubbing his chin. If Seth were here, he would've praised this man's intelligence.
Seth dove into the depths quickly. "Hmm, it's hard to swim with one hand," he thought gloomily as he dove deeper. After a while, he stopped swimming, raised his head, and looked at the distant water surface. "Hmm, I'm far enough from them..." Seth thought, then closed his eyes.
The reason he dove was that he didn't want Deis and Ace to see that he could transform into a Sea King. Even if they linked it to a Devil Fruit, it wouldn't make sense when they saw he could swim freely in the sea, unlike Devil Fruit users who lose their strength and drown the moment they touch the sea.
With a single thought, his skin began to turn dark purple.
His skin rippled, and then magically, scales resembling armor began to form from his skin, and at the same time, his body swelled and distorted until it finally took the shape of a giant sea serpent king.
Roar!!
He let out a terrifying roar that frightened distant fish and some smaller Sea Kings.
[New alien lifeform detected...]
[Confirm DNA scan...?]
"No, not now..." Seth replied without hesitation to the watch's notification. He had previously asked the watch not to scan any new DNA without his confirmation. He was afraid of falling into the same situation he had with Ace.
If Ace weren't different from other pirates, he would undoubtedly be dead by now. Despite his pride, he bitterly admitted to himself that he couldn't even defeat Deis, let alone Ace, who had a power.
That experience made him realize something he had forgotten—without the watch, he was nothing!
His body twisted, and he began to swim rapidly toward the black dot above. He quickly approached the World Government ship.
On the ship's deck, there were five individuals, all wearing masks and white coats. Suddenly, the expression of one CP1 agent changed. He ran quickly to the ship's edge and stared at the sea below with a frown.
"Hmm!! Strange..."
Another agent noticed his behavior and asked, "Hey, Towa! , What's the matter!? "
"The target's location has changed!!..." he replied while his eyes never left the sea.
"Oh! Did he discover our presence and decide to flee? What a clever rat..." mocked one of them, but the other member who had asked earlier noticed Towa's seriousness and asked again,
"Towa!! Is there something wrong!? Where is the target now!?"
Towa, the user of the Aura Fruit, did not respond. It's a weak fruit in combat but amazing in investigation. He can sense the aura of any living being or object, and if the aura hasn't faded for more than seven days, he can easily track its owner.
They received a call from their commander, who had assigned them the task of investigating the Celestial Dragon's murder. Luckily, they were already on a mission in this part of the sea to escort an important treasure from the Kingdom of Goa to Mariejois.
Towa's ability allows him to create images or illusions of a dead person based on the remnants of their aura, provided the death occurred within the past seven days. With this ability, they managed to see the last moments of Saint Marcellus and identify the killer. Towa used his power again to track Seth's aura signature, which led them here.
But only now did Towa feel Seth's location change. He clearly sensed that his current position was exactly beneath the ship and approaching very rapidly with no signs of stopping.
"The target's location has changed. He's right beneath us... and he's approaching at high speed and..."
"What!?"
The rest were surprised but didn't care much. They felt he was saving them a lot of trouble and time, but Towa disagreed...
"That's good, I'm tired of this chase..." said one agent while unsheathing his sword. "Since he's here, I'll make sure my sword tastes his blood..."
Another agent added with annoyance,
"What's all the fuss? He's just a slave who took advantage of the Sea King's attack on the ship and killed Saint Marcellus..."
With Towa's fruit, they saw some glimpses of the incident and assumed a Sea King had destroyed the ship, while Seth took advantage of the situation, freed himself, and killed Saint Marcellus.
Roar!!
Suddenly, everyone felt the ship start shaking violently due to a sudden disturbance in the sea. The sea trembled suddenly, and the waves rose without warning.
Suddenly, the ship began to shake more violently, as if something massive was moving beneath it.
"What the..."
whispered one of the sailors responsible for routine ship duties, trying to hold onto the side railing.
But before any of them could understand what was happening...
BOOOOM!!
The bottom of the ship exploded from below. The giant sea serpent king burst through the ship's body, rising at insane speed. His massive coiled body tore through the wood, planks flew, and smoke rose into the sky.
"Damnnn!!"
The agents quickly leapt away from danger, but one of them, who tried to jump away like the others, was too slow...
Seth opened his mouth in his monstrous form, rows of sharp teeth appearing in an instant.
CRAAACK!!
He closed his jaws on the body that was in his path. His fangs pierced the agent's body, crushing it in a horrifying scene.
Spit!!
Under the stunned eyes of the agents who were floating in the air using one of the six marine techniques, Moonwalk, the giant sea serpent king spat out the mangled body of the agent like it was something unimportant before narrowing his eyes at the rest.
He moved again and began trying to destroy the ship with his tail.
A shockwave burst from the sheer force he used, and the soldiers fell from the deck in every direction.
Above, only six CP-01 agents remained.
The commander clenched his fist tightly when he saw the death of the sword-wielding agent who had been boasting earlier. He turned to look at Towa, who was sweating under his mask.
"Towa!! What is happening here!!?" he asked loudly while adjusting his stance and kicking toward the Sea King who was wreaking havoc on the ship.
"Rankyaku ..."
A slicing wave was launched at high speed, targeting Seth's head, who sensed it using his sixth sense and dodged the attack, only to be struck by another from a different agent.
Roar!!
He screamed in rage and pain because of the horrific wound that appeared on his body. His blood gushed like a waterfall from the deep wound.
"Damn it! Their power level is completely different..."
Seth thought gloomily and with fear. He avoided the other attacks, then retreated, and his body began to sink back into the sea, but before he did, he released an electrical wave with all his power, killing the weak and paralyzing the strong aboard the ship.
He dived quickly into the sea and spotted several crates sinking. Without hesitation, he opened his mouth and swallowed them, or rather, stored them in his mouth.
"Damn that cursed monster, he completely destroyed the ship..."
said the CP1 team leader angrily as he stared at the sinking vessel.
They landed on what remained of the ship. The commander quickly ordered,
"Quick, check the cargo hold. That cursed beast pierced through the area. We can't risk losing that treasure..."
"Damn it! Isn't Sea Prism Stone supposed to repel Sea Kings? What's happening here then..."
He turned to look at Towa and said sharply,
"Oi! Towa! Check the target's location again..."
"You ... ! You just fought the target!!" said Towa with a solemn tone while pointing downward.