1 - 20 of 12,089 Works in Alternate Universe - Merpeople
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Worn down from years of strife as the last of her kind, Madison once believed happiness was far from reach. Everything begins to change when she meets a man called the Doctor. As secrets and sorrows are shared between them, the pair finds comfort together amidst the stars. Madison can only hope that this time things will be different, even if the universe has other plans for her.
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Anchor Lost by Shy_Secret
Fandoms: 人渣反派自救系统 - 墨香铜臭 | The Scum Villain's Self-Saving System - Mòxiāng Tóngxiù
17 Oct 2025
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Shen Jiu hates humans. Hates the way they steal their food. Hates the way they poison the water with their foul creations. Hates the way they just take and take, leaving only blood in their wake. But for his brother, he will become one of them. Become a monster, and bleed them dry.
Series
- Part 3 of Mer Au!
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Whumptober 2025 by Creatively_Written
Fandoms: Transformers - All Media Types, Transformers Generation One, Transformers One (2024), Transformers Animated (2007)
17 Oct 2025
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It's that time of year again! Time for Whumptober!
Our first story: Iacon and the high guard have reached a peace agreement, for the Quintesson threat still looms. Optimus and Megatron need to get ready for the ceremony.
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A few one-shots, each a different AU!
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A month of smut and things that can be smut if you're built a certain way.
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A Storm Of Magic And Love by Ohio_uwu
Fandoms: プロジェクトセカイ カラフルステージ！| Project SEKAI COLORFUL STAGE! (Video Game)
17 Oct 2025
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Leaving your home and becoming a pirate is something done too many times. But Tsukasa is Tsukasa, he's not like the other pirates! He's the future star of the seas, accompanied by... well, the most unexpected crew. A loud captain, a genius strategist who’s also a powerful sea mage, a siren and a rebellious princess together looking for treasures? Why not?
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Gift of the Fallen Queen by SongbirdRen15
Fandoms: 崩坏：星穹铁道 | Honkai: Star Rail (Video Game)
17 Oct 2025
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Captain Aventurine has been sent to Penacony, the mystical land under the sea, tasked with obtaining blackmail on the five royal families. Unbeknownst to his contracted employers and the doctor assigned to his wellbeing, Aventurine has his own plan to set in motion, one that might finally grant him freedom…in one form or another.
Series
- Part 1 of Pirates of the Asdana
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To the Waves, We Return by EmmaSmoke
Fandoms: Sonic the Hedgehog - All Media Types, Sonic the Hedgehog (IDW Comics), Sonic Prime (Cartoon 2022)
17 Oct 2025
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After the vagabond Sonic gets into legal trouble with Clean Sweep Co., he's hired to be a janitor (blackmailed into being a spy) for Spagonia University, specifically the wing that deals with the merfolk. Despite their violent nature, Sonic starts developing a bond with the sea creatures, particularly Nine, the one who looks like the brother Sonic lost. Even stranger than that, he's also forging relationships with the workers at the university and the people connected to them.
But the truth of who he is will come out eventually, and the fallout might be impossible to handle if he doesn't figure out Clutch wants in all of this.
Or, Sonic teaches merfolk how to belong while also learning this lesson and how to healthily deal with his own grief
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Too many ideas in my head so I’m going to compile all the ones I feel possible to create a full story for in hopes it’ll help spread the ideas and let me focus on my current working fics.
Series
- Part 1 of Ideas and Their Fics
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The Wake of Devastation by Holdt
Fandoms: Man of Steel (2013), Batman - All Media Types, Batman v Superman: Dawn of Justice, Superman - All Media Types
17 Oct 2025
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A story of seven desperate mer who became two hundred thirty-seven thriving mer. Who learned that hope isn't weakness, that love isn't vulnerability, that family is choice, and that resistance—stubborn, impossible, beautiful resistance—can heal a dying ocean one song at a time.
- Language:
- English
- Words:
- 71,888
- Chapters:
- 30/30
- Hits:
- 3
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Summary
“Um,” said Danny, blinking, squinting, and tilting his head to one side. “It’s a little bluer than usual, maybe?” He turned to look in other directions for comparison. “Yeah, it’s bluer. Kind of that sea-blue-green whatever color. Is that a bad thing, or…?”
Series
- Part 8 of Dannymay 2023
- Part 3 of Painting in Different Colors
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My Masterful Manipulation of Monsters by GoblinModeShrew
Fandoms: Call of Duty (Video Games)
16 Oct 2025
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You were kicked out of your den near the surface. Desperate for shelter, you travel to the depths to see if you can find a territory of your own. A giant squid mer notices you, and instead of choosing to make you his next little snack, invites you into his den. Determined to keep your place by König's side, you endeavour to make König your mate.
Made for Mermay 2025, not posted until now because I'm a loser.
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Since his incident when he was fourteen, he’s always had a greater affinity to water compared to his fellow merfolks. After all, even if it took his gift in singing away, Ajax’s water manipulation is now without match.
As he chants in his mind that he can do this, that he can protect them, even while away to find a cure, he erects a watery barrier around the village.
He knows his watery constructs can resist against the flow of time, he just hopes this barrier will do the same.
Now, he’s a Leviathan to hunt.
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At Hogwarts, Remus Lupin has a secret deeper than anyone suspects. He's not a werewolf, but a merman, cursed by a mysterious magical pool as a child. Every full moon, he’s pulled to the depths of the Black Lake, where transformation is inevitable, painful, and isolating. Only Lily Evans knows the truth, having uncovered it by accident years earlier. She has kept his secret and helped him manage the toll it takes on his body and spirit.
Now in their fifth year, Sirius Black starts to notice things: the way Remus disappears, the darkness inside he tries to hide, the excuses that no longer make sense. When Sirius follows Remus one night, he finds more than he bargained for. The truth is stranger, more magical, and just a bit more heartbreaking than anything he imagined.
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The Siren's song by FallenStar777
Fandoms: Fire Emblem: Seisen no Keifu | Fire Emblem: Genealogy of the Holy War, Fire Emblem: Thracia 776, Fire Emblem Series
16 Oct 2025
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Tine ran away from Friege castle after her mothers death at the hands of Hilda. Vanishing into the sea to only be born again as a maiden of the deep. Two years later, Ced decides to disappear into the waves as well. Both becoming sirens.
They learn accept their new forms and to challenge their grief by living on. (I will add or change this more when I am finished with this)
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Looks Like the Boy's Too Shy by P_Artsypants
Fandoms: How to Train Your Dragon (Animated Movies), DreamWorks Dragons (Cartoon)
16 Oct 2025
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Astrid Hofferson didn’t care about boys or falling in love. She was training to be the best warrior on Berk.
That all changed when she chanced upon Hiccup, a merman basking in the sun on her favorite beach.
They both found it startling how quickly love found them after that.An archive of a roleplay thread with DragonMasterHiccup on Tumblr.
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Dark Blue Moon and the Suffering Sun by IAmTheShpee
Fandoms: Danny Phantom, Batman - All Media Types
16 Oct 2025
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It was a mess neither of them wanted to be in. There was an attack in Amity. Damian was pulled beneath the waves, and Danny Phantom was too late to save him from drowning. The kid was long gone.
Danny had no choice but to turn him into a siren to keep him alive, but that was far from the end of their troubles. With Amity blockaded, they're forced to travel the oceans to bring Damian back home to Gotham. Between the hunters, family members and his all-important secret, Danny can only wonder when something terrible will happen, not if.
Series
- Part 1 of Demo’s Mer Obsessions
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The underwater kingdom of Gillysea is dark and dank, but Regulus Black, the last remaining prince of the Mer, has never known anything else. That is, until one day, he decides to visit the surface. What he finds there is that he knows nothing about the world, and even worse, knows nothing about himself.
As sleep pulls him under, the last thought that crosses his mind is that they're even, he and James. They've saved each other, haven't they? Regulus can't help but wonder if either of them stink of doom.(it's the little mermaid until it's not)
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“Are you alright?” His voice is like a silky timbre, melodic, and concerned.
Foggy really must have died and gone to heaven, cause this is an angel if he’s ever seen one.
The man’s hair is brown, cut short but overgrown and clinging to his forehead in waves. It looks like they’re the same age. His face is slim, with a little crook to his nose, and full red lips. He could be a Greek statue. He’s also shirtless, which registers as weird in Foggy’s mind (since it’s ten degrees outside), but he also doesn’t really mind because holy shit this guy is shredded.
Foggy swallows dumbly. He follows those enticing pecs down, marveling at the abs cut beneath silken skin, eyes trailing to wide hips, and…
A sleek, glittering tail emerging from them, curled to the side and ending in a wide fluke.
It’s red. A crimson so deep, it looks like fresh blood.
“Holy fuck!”-----
A Mermaid!Matt AU where Foggy is a human, who just so happens to have frequent run-ins with the only denizen of the Hudson River in New York.
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Of Dragon Scales and Mermaid Tails by BrailleVig
Fandoms: 崩坏：星穹铁道 | Honkai: Star Rail (Video Game)
16 Oct 2025
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The Vidyadhara are not the only creatures blessed by the Permanence. Alongside the Vidyadhara are the protectors of the luminescent depths - the Matsya-kanyas, also known as the merfolk by the universe, who are tasked to safeguard and protect the secrets of the Vidyadhara while possessing eternal lives. One such mer was Caelus - a visionary among his kind…
That was until he witnessed the divisions of the waters of Scalegorge Waterscape, caused by the exiled Vidyadhara high elder Dan Heng.