1 - 20 of 130 Works in Merperson Levi Ackerman
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When ambitious marine biologist Erwin Smith stakes his career on a deserted coastal research station, he never imagines the secrets hiding right beneath the surface. Drawn by impossible signals and a presence he can’t ignore, the boundary between the scientist and the unknown creature he’s chasing begins to vanish.
As the only world he knows slips away, another rises to claim him — until he finds himself suspended between them both. -
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Maia, a marine researcher from the Paradis Trench Marine Research and Conservation facility, returns to deep-sea diving after a long hiatus due to mounting professional responsibilities. While accompanied by her colleagues Niccolo and Onyankopon on an expedition in Marleyan waters, she begins to sense an eerie, powerful presence in the deep. What starts as a routine mission quickly spirals into a terrifying encounter before being taken by a mysterious, gentle force in the abyss.
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The Leviathan by Kayteelou22
Fandoms: Shingeki no Kyojin | Attack on Titan, 進撃の巨人 | Shingeki no Kyojin | Attack on Titan (Movies)
15 Sep 2025
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You thought you survived the wreck. Until the ocean reached back — with a sharp jaw, steel-grey eyes, tentacles, and a hunger no human should possess. Dragged beneath the waves, you learn the undertow doesn’t just drown… it breeds.
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When Erwin set out to sea that morning, the one thing he did not expect was for his boat engine to die. Or for a half-man, half-fish creature to jump onboard.
Series
- Part 2 of Ocean blues and red ties
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Where the Waves Sing (I'll Follow) by Hail_Shade
Fandoms: Shingeki no Kyojin | Attack on Titan
18 May 2025
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“Where is he?” Erwin murmured to himself, scanning the tumultuous waters further out. Surely he would have been able to hear the thunder even if he was submerged meters below the surface. The currents no doubt would be stronger too, indicating the approaching storm.
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A storm forces Erwin and Levi to go home earlier than expected from a research trip at the beach.Series
- Part 1 of Ocean blues and red ties
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It was a mistake to meet him and there's no other choice to you when his eyes already claimed you at sight.
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He could’ve let Hange die but he didn’t, seeing the fight in her broken body. He spent three days by her side before leaving her, three days that mean nothing, should mean nothing.
And yet she’d skilfully managed to steal the taste of lemon away from him. And so, Levi sees her five more times afterwards.
Series
- Part 2 of forgiveness (can you imagine?)
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Mating season was when the water was at its warmest.
High above the ocean floor was where the pod of lucrative and exuberant mermaids lived, right between where the water was cooler in the darkness and where the water was naturally heated by the sun. Living any closer to the deep dark depths meant living amongst some of the scariest predators in the ocean. Ones that would happily feast on their kind if given the chance.
Sharks in particular.
Series
- Part 1 of Secrets of the Sea
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Hange is an aspiring astronomer travelling to Marley.
Levi is the merman who happened to save her.
Series
- Part 1 of forgiveness (can you imagine?)
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The Fertility God Gains a New Devotee by DamonTheGayman
Fandoms: Shingeki no Kyojin | Attack on Titan
21 May 2024
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LEMerMay2024 Day 21: God/Goddess
Levi is a hunter in a small fishing village. Nothing exciting ever happens, and at this point levi is content with life as it is. He has his Mama, his tea, his horse, and enough money to do whatever he wanted.
Nothing exciting ever happens, so why are there hundreds of people in town claiming a goddess of fertility will soon be passing through?Human Levi x Merman Eren which then turns into Merman Levi x Human Eren
filthy smut -
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The mermaid exhibit in Sina's Aquarium isn't bringing in the money hoped as the merfolk within doesn't want anything to do with humans. Hanji is worried about Levi's future when they observe the loner take a quiet interest in one of the janitorial staff. Naturally, they have to shove these two together to see what occurs!
A world of soulmates, merfolk culture and the ties of the Ocean Mother is about to open up to Eren, who has always been self conscious about what he thought was a scab behind his ears.
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You can make fanart of this story! You don't need to ask! <3 Just link back so I can add your work to show off!
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They had been meeting up like this under the moon and the endless dark sky of stars for quite a while now. Levi could not recall exactly how long, but it was a special place that he and Eren visited more times than he could count. It was the only way for them to mate while staying close to home due to their differences causing them to be forbidden from being together. Eren was a shark who was supposed to hunt mermaids such as Levi, but the brunet turned against his nature and saved the injured mer many moons ago.
Ever since then, they had arranged to meet in secret when the moon was bright, signaling a clear night and a safe time to roll around together. Leaving the ocean to mate was the only way they could open themselves up to each other without giving away how secretly intimate they were to others.
Series
- Part 2 of Secrets of the Sea
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As a boy, Prince Erwin meets a very interesting sea creature he's only heard of through gossip and legends. As a man, King Erwin promises the same creature his loyalty.
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Thank You by DragonsFeather (Plumededragon)
Fandoms: Shingeki no Kyojin | Attack on Titan
30 Nov 2023
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“The story of life is quicker than the wink of an eye, the story of love is hello and goodbye, until we meet again.” – Jimi Hendrix
In the afterlife, following the end of the Rumbling, Erwin found himself alone, in a strange place.
In this place, five doors. Each leading him to an unknown world that would let him meet his most important person: Levi.Inspired by Maerwin21 arts of Erwin meeting different Levi in the afterlife (links in fic)
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“Tell me, Levi,” Erwin asked softly. “What is it like to court someone under the sea?”
The blush that was originally isolated to Levi’s cheeks spread at the question. Giving more of his face a brush of color. “W-why would you want to know something like that?”
Erwin shrugged, letting his one hand drop to the cool water. Watching the little ringlets fan out from his touch. “Call me curious.”
“Are you planning to court a mermaid or something?” Levi continued to try and dodge the question. Unfortunately, Levi didn’t account for Erwin’s boldness with his question.
“More interested in courting a merman if I’m being honest.”
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Day 4 of NSFW Eruri Week 2023
Prompts | Monster Fucking -
When the Ocean Calls, I Answer to You by HoeDM_Gear
Fandoms: Shingeki no Kyojin | Attack on Titan
12 Jul 2023
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Eren’s always loved the beach. When he finally gets to return to the coast after years of being away, he finds himself with more than just some sea shells and a sunburn.
A lot can change in just a few days. Even more so in a month.
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Just a straight up Merman on man porno.
Y’all know what I’m about.
No longer straight up porn, now with plot*.
*5/2023 edit: The plot is dumb.
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Rivaereri MerMay 2023
Week Four Theme: Sirens
Day 2: Deep Sea
Tropical Mer! Eren likes to visit his pod every month or so to see his friends and family and bathe in the sunshine, but only for a few days. After all, he misses his Deep Sea Mer! Levi too much to stay away for long. little does he know, Levi has been missing him greatly and is not planning on letting him go anytime soon. Filthy smut.Series
- Part 9 of Rivaereri MerMay 2023
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After being overthrown by their first mate, ex-captain Eren found themselves walking the plank.
Luckily for them, they have a merman for a lover.
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Rivaereri Mermay 2023 Twitter Threads by DamonTheGayman
Fandoms: Shingeki no Kyojin | Attack on Titan
13 May 2023
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Basically where I will be putting threads because even if the story is short posting it two sentences at a time is hell.
Chapter 1: Day 3 Sea Creatures: Levi is trying to court tropical mer! Eren but is having trouble figuring out his customs. TLDR: He listened to Hange
Chapter 2: Week 2 Day 6 Captive: Levi is a grumpy merman feeling lonely inside Shiganshina Aquarium. So what happens when a smaller pup suddenly gets dumped into his tank?Series
- Part 3 of Rivaereri MerMay 2023