A/N: Hello, people! My first Merlock fic!

I don't own Sherlock or the parts of Percy Jackson that I'm using.

I have no beta.

ENJOY!

CHECK ME OUT ON TUMBLR. THE LINK IS ON MY PROFILE. I FOLLOW BACK.


Sherlock had resided in the waters of his home for years. Too many to count, but he did watch as the human - homo sapiens - advanced. From wooden seacraft to heavy, massive, crafts made of 'steel'. The humans added things to the Iron in order to make Steel, which was more durable.

There were no more pirates in his area. Not more sailors passing by either.

The nearest human settlement had started not too long ago. With homes growing from wood, to strange red bricks and white rock, with their buildings stretching into the blue sky.

Their transportation, 'automobiles' advanced as well. Sherlock was intrigued to learn how they were created and how they moved with aid of a horse.

Sherlock lived near a cove, surrounded by a beach. The humans called it Crystal Cove and though it was a good name, it was terribly inaccurate. The cove was half beach, half rocky cliff and the cliff was covered in hundreds of colorful gemstones, but none of them were crystal.

The outside of the cove, that faced the open waters of Poseidon's kingdom, was mostly blocked by large rock formations that shot up from the water, creating a blockade of sorts. Small fish, merfolk, and humans could fit through the spaces between them, but the strength of the current would be too much for the humans and they'd be pulled out and lost. The fish would be safe if they were far down enough. And merfolk, well, Sherlock had a lot of physical strength yes, but his most powerful asset was his tail.

It was long and covered in shining blue scales that matched the color of the water. A bright turquoise that sparkled in the sunlight, but glowed in the moonlight. Each scale was about the length of his smallest finger and they overlapped each other in triangular shapes.

He had two pelvic fins that flared out a little below his hips. They were long and while they looked flimsy due to being partially transparent, they were very durable.

His tail was extremely long and ended with a fan shaped caudal fin that was mutated. Unlike other merfolk whose caudal fins were shaped so they moved side to side in order to help them move, his fin was flat, resembling a human hand fan closely. It could not move from side to side, instead it moved up and down. While Sherlock had always been made a mockery of because of his mutated fin, he'd always been extremely faster that all the other merfolk, so he could cushion his ego on that fact.

Several inches above his caudal fin, were two anal fins, both on equal sides as the pelvic fins. They were long, reaching to his caudal fin easily and helped stabilize him so he didn't teeter around and lose course.

Sherlock was very different that most merfolk. Mermaids were usually the ones to have excessively, flowy fins. They had pelvic fins, merman didn't. But merman had adipose fins, which were found on the dip of their lower backs, mermaids did not have them. Sherlock both, which tended to keep the other merfolk besides his brother Mycroft, away. He had male and female body parts. He was… abnormal.

He didn't care. It wasn't like being 'normal' was amazing anyway.

Sherlock had swam for better residence the moment he reached his majority and he found his little cove that the humans sometimes ventured to in order to go for a swim. He would observe, they'd muck about, playing endless games and indulging in frivolity, and then they'd leave. Sometimes they'd forget their belongings and Sherlock would drag himself into the beach and then back to the water before they came back.

He had a whole collection of human objects in the small, underwater cave he resided in.

He'd like to understand them, but was satisfied enough with his treasures that he didn't seek the aid of any human. He knew of the stories. Fiction or not, he knew the humans would either be fascinated or terrified of him and both led to the same outcome. Experimentation, which he was not okay with. Either they'd want to see how his body functioned, or they'd want to learn of what he was and how properly to kill him. He was not a fool.

Sherlock resided within his little cove for many years, feasting on the fish that strayed too near, receiving random visits from Mycroft, and observing the humans to his heart's content.

But one day… something amazing entered his cove. It must have happened while he was sleeping, though he didn't understand how it made its way into the cove with the rocks blocking the only entrance via ocean. It was too big to fit inbetween the rocks, but Sherlock could not for the life of him, figure out how it appeared. But it was there.

It greatly resembled a horse, though the front legs thinned out into large fins. The body with similar with two pelvic fins in the proper space. Then it too thinned out into a very large, forked caudal fin that was flat like Sherlock's was! It was blue, not the same shade as Sherlock's tail was, but just as eye catching. More like cerulean. And there were small spots of rosy pink and bright violet here and there near the neck.

The crown of the head was adorned with pointed spines that trailed down the back of the neck and flattened against the creature's back until they were indistinguishable.

The eyes were the same color blue as the body. Just like Sherlock's were the same as his tail!

He swam closer to the creature, that eyed his approach warily.

He reached out carefully, longing to stroke the large neck of the beast.

It was cold! Much like he was.

"What are you?" Sherlock murmured to himself.

The head shifted and the creature pulled away from him. Its fins moved and then it was ascending toward the surface. Sherlock followed.

The creature breached the surface and headed for the sand. Sherlock followed suit, wondering what it was going to do.

And then, right before his eyes, the beautiful horse-fish morphed into a human!


A/N: First one is done.

-My art for Sherlock is available on the AO3 version of this fic.

How was it?

Let me know.

Check out my other Johnlock fics.

See ya! :D

CHECK ME OUT ON TUMBLR. THE LINK IS ON MY PROFILE,. I FOLLOW BACK.