Hello! Welcome to Aquatic Decendants' first story. This is a collab story with The Dementors Dinner Party, who promises to finish Unabii soon but not right now. The DDP is busy with another story. So, the full summary is in the description.

We do not own Percy Jackson. If we did, certain characters would still be alive. The rights belong to Rick Troll Riordan. But one day, we can free the characters from his prison and make them live normal, happy lives.

Enjoy!

Chapter One

Lord Triton Gets A Migraine

Percy Jackson wished it'd be as simple as knocking on an apartment door and retrieving a magic fork, but he had to be in captive of a god. It all started when he was chilling in Poseidon Cabin listening to the sloshing of waves in Long Island Sound. He tried not to think of his failure of the day. He'd humiliated himself in front of half of the camp. But worse? He had shot Katie Gardner with one of his arrows in archery. He knew he deserved every prank from Travis Stoll that was coming to him. But what he was about to endure would be worse than any prank the Stoll brother could think of.

Because in that moment, he had to look away as a god flashed into his cabin, disturbing the calm and bringing forth the storm. Percy sighed. It was fun while it lasted. He reluctantly looked over to the door, where the uninvited quest had appeared. The man looked around twenty something with a battered fisherman's hat and blue eyes. He could've been mistaken as a prince of England but Percy knew who he was. He was a prince. But not just any prince… this was his - dare he say it - his brother. The merman's tail had been replaced by human legs but Percy still recognized him from his first time in Atlantis. The first time the idiot had turned his tail on him. After Triton fixed up his fisherman's hat, his eyes landed on Percy.

"Ah!" He said in faked delight. "I thought my father's bastard child would be waiting here!"

Percy raised in eyebrow. Oh, how the gods interrupted! He knew why Triton was behaving like this. Wives of unfaithful gods could be hot headed. Take a child of an unfaithful god? There's sibling rivalry, constant glaring and lots of jealousy. Percy prefered not to mix with that side of his father's family. Heck, he tried not to mix with anyone from his father's side of the family! Somehow, it, always ended in bloodshed. Okay, not in real bloodshed, but you get the drill.

Percy rose from his comfortable spot on the bed. He gave a bow - not like he deserves it but the need to survive this without being pulverised was larger than his need to be impertinent right now - and said, "Hello, Lord… eh, Triton? Right?"

The man glared at him, his eyes narrowing. "Yes… Lord Triton, king of the sea, immortal son of-"

"Yeah, yeah, yeah, spare me the speech, princess," Percy brushed it off, letting his sarcasm take the best of him. He crossed his arms over his chest. That speech was another one of the reasons he doesn't visit his father anymore. "Why are you bothering me?"

Triton glared and mumbled, "I expected a bit more respect." But his reason of being here seemed to be more important than killing off his brother. Triton straightened up and narrowed his eyes at Percy. "You, Perseus Achilles Jackson, are an embarrassment."

Percy cocked up an eyebrow. "Sorry?

"Nobody thinks the 'Monster Slayer' is an interesting topic. Especially if that said 'Monster Slayer' is you."

"Wait. Who are these… nobodies you speak of?" Percy asked.

Triton sighed in frustration "The lesser mermen and women."

"Aw… is wee Twiton gwetting bullied by the other kids?"

Triton growled, his eyes swimming with rage, "I'm going to pretend. I didn't hear that."

"Thank you," Percy said, rolling his eyes "You were saying?"

Triton huffed but continued "The lesser mermen and women. They do not seem interested in you. I don't think they are listening to me! You defeated the Titan King Kronos, you went to the Underworld when you were twelve years old, you survived the Labyrinth, you were offered immortality-"

"But I turned it down."

"Exactly!" Triton shouted, throwing his hands up in the air "You turned it down! Why did you turn it down!? I could've been famous!"

"You could've been famous?"

"A legend, Percy Jackson! But now I have to listen to this one bragging about his little brother in Father's immortal army! This one's little sister is working alongside Mother! And this one's little sister can hold her breath for an hour!"

"She can hold her breath that long?" Percy asked, a little skeptical.

"That's what I keep hearing!"

"I can breathe underwater, that has to count for something right?" Percy messed up.

Triton's eyes were whirlpools of rage. But he slowly calmed himself down, muttering profanities under his breath. He calmed down enough to say "You get what I mean. I'm a laughing stock. Apparently the Savior of Olympus isn't enough to please them. The King of the Sea is yesterday's news. And you - little brother - suck scum as much as I do."

"Ouch, I expected a bit more respect," Percy said, imitating his brother's voice. "So what do you want to do with me? Play Pinochle? Perhaps I'm the best gamer you have ever seen?"

"Don't use your petty little sarcasm on me, mortal," Triton glowered, wagging a finger in front of Percy's eyes. "I am a god and will be treated as such." Percy's mouth opened, ready to remark on his fisherman clothing, but decided that maybe life was a better option. He shut his mouth with a snap before he could sign his death certificate. Annabeth and Grover wouldn't like that. Triton seemed satisfied with that. "I prefer not going around lacing my brother as 'Monster Slayer' and 'Card Game Expert'. I'd be mistaken Dionysus' brother." His nose wrinkled at the last line.

Percy couldn't resist, "Maybe change your outfit, perhaps you'll grant more respect from your subjects."

Triton looked like he might flash into his godly form, but instead tipped off his fisher's hat and ran a hand through his hair. "Don't be a brat, Perseus." He fixed on his ridiculous hat again and tugged on the ends of his vest. "Now, I'm gonna … er … make an actual brother out of you."

"Excuse me?" Percy asked but was immediately cut off.

"I'm gonna teach you a few of the Poseidon children's talents. Gifts that father blessed on very few. So if you have that power inside you - which I hope you do - I can teach you these ways and you will use them in your following attack. Word will most-likely spread out, and great gods of Olympus! It might just reach the Palace's ears… then those upstart snobs can learn better than to turn their fins on the king of the sea."

"Your little attitude there makes me believe your an upstart snob yourself," Percy commented. Triton glared back at him. "Please continue with your glorious revenge, Lord Triton." Percy added in mock gratitude.

"Do you accept?"

Percy studied Triton for a second before blurting, "You were serious?"

"What!? You expect me, a god, to lie? To go around telling ghost stories of vengeance?" Triton barked, Percy feared for his brother to get a vein on his temple pretty soon.

"Well…" Percy mumbled, tapping his foot on the ground.

"For gods' sake, Percy, I have better things to do!" Triton groaned and rubbed his forehead "I'm not supposed to get headaches." He sighed and looked back at his brother "Do you accept?"

"Uhm…" Percy said "What did you mean exactly… by Poseidon's ways?"

Triton groaned "UGGHHHH! Mist traveling! Sirens Speak! Underwater socializing! Stream swimming! Getting to know your subjects' names! Learning proper resp-"

"Okay! Okay!" Percy screamed hastily. He feared his brother would suffer a stroke.

"Don't 'okay, okay' me! I'm on a roll here!" Triton shouted "You wanted to know the 'powers of Poseidon' well then welcome to my world! Unfortunately, we can't grow you a fin so that's still a disadvantage! But there's so much to do! For an example, an underwater school you can go to instead of Good Boys' School-"

"Goode High."

"- fighting for your Trident, we can let you do that!"

"I don't want a trident," Percy said, fishing out his pen and showing it to Triton "See?" Triton looked confused before his eyes widened in realization. Then it changed to rage. "Gods! What now?"

"UGH! You have Anaklusmos!? Father said he threw it away!" Then he stopped and his eyes widened again "I can tell them that. That'll show them. My brother possesses the sword Anaklusmos and saved the world with it. Finally! Some justice!"

"So… no more Poseidon lessons?"

Triton glared at Percy "I can't afford to have a weak brother possessing the sword of our father."

"I have the curse of Achilles."

"You have the fricken curse of -" Triton groaned "They don't tell me anything." He turned to Percy "You're still getting those lessons."

Percy groaned, "Why?"

"Because I'm older, smarter, more successful and…" He huffed "I don't have time for this. I have duties to attend to in Atlantis. So… I'm gonna go back, take an Advil and attend said duties. Tomorrow, I will come get you for you first lesson. And gods' forbid if you weren't gifted with anything cool. Farewell Perseus."

"Farewell, O so great -" Percy stopped himself. "Farewell."

And with that, Triton disappeared in a godly light.

Please review and follow. Just review is fine, though! The more reviews, the more the need to finish this fanfiction will rise and so will a certain someone's ego. (hehe)

- Aquatic Decendants