1 - 20 of 89 Works in Merperson Danny Fenton
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Dark Blue Moon and the Suffering Sun by IAmTheShpee
Fandoms: Danny Phantom, Batman - All Media Types
16 Feb 2026
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Summary
One seeks to return home. The other runs away from home to escort him. Two boys from vastly different backgrounds must swim across the world. However, the vast oceans aren't the only things they must navigate. Between a complex political landscape above and beneath the sea, blood-thirsty government agents, conniving hunters, scheming kings and even their own parents, can these boys survive the journey, or will their own differences tear them apart?
In which Danny Fenton and Damian Wayne swim around the world, and find friends and family at the end of the road.
A story in 2 acts (so far!)
Act 1, The Pacific: Chapters 1-35
Act 2, The South: Chapters 36-Ongoing
Act 3: ...?Series
- Part 1 of Demo’s Mer Obsessions
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Danny gets a new hobby underwater and ends up saving a drowning hero,
Kon nearly drowns on a mission but gets saved by a mysterious merperson, he wants to find them again to thank them,
no he’s not in love with them, not at all.Or
Danny saves Kon from drowning, and Kon falls in love with him.
(I don’t know if that makes sense, i’m shit at writing summaries, btw this is updated weekly, unless stated otherwise, bye)
Series
- Part 1 of xXx_Nightingale_xXx's works
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Legally Speaking, I Shouldn’t Be a Mermaid by brieatcookies
Fandoms: Danny Phantom, Batman - All Media Types, Justice League - All Media Types, Aquaman (Comics)
07 Feb 2026
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Across the vast ocean basins, a series of unnatural vocalizations reverberated through the depths. It was loud, rhythmic, and disturbingly irregular. The patterns defied known marine behavior, their echoes carrying far beyond their intended listeners. Before long, the anomalies had drawn the attention of the Justice League.
In other words, Danny was held captive. His option was to scream at the universe for help.
Series
- Part 1 of Dead Boy in the Water
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In The Lair In The Caves by EmeraldsAndAmethyst
Fandoms: Batman - All Media Types, Danny Phantom
03 Feb 2026
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Summary
Jason tracked down his annoying little brother and told him his mate and his suspicions about his mate being trafficked. He didn't want to wake Danny up early, his mate needed his sleep after everything he'd been through. But when Jason is ready to end his day and his mate is still sleeping Jason starts getting worried.
He hadn't needed to worry. He wakes up with his mate being an impossibly attractive menace and insisting on doing weird and kinky human things. Starting with kissing.
Series
- Part 4 of Mer AU
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Can Star Sirens Count to Five? by IAmTheShpee for deadstart
Fandoms: Danny Phantom, Justice League - All Media Types, DCU
28 Jan 2026
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Summary
While waiting for their parents to return from a conference, Star Siren kids Danny and Jazz are entertained by the Flash and Superman.
Series
- Part 63 of Demo’s Mer Obsessions
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Bruce brings the news to everybody. After 30 years, he's finally been reunited with his parents, and they want to see his family, his whole family.
Danny wonders if that includes him too.
Series
- Part 7 of Cozytober 2024: Sirens!
- Part 62 of Demo’s Mer Obsessions
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A cold lazy morning with a fun liason between a pirate captain and his dear kraken. Featuring some extremely fresh sea food as breakfast.
(Can be read stand alone from series)
Series
- Part 3 of Pirate AU (name pending)
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Still Waters by TheStarfishAlien for Vender_Nyx
Fandoms: Danny Phantom, DCU, Batman - All Media Types
05 Jan 2026
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Summary
Lady Gotham is a ship whose crew sails by the light of the moon and the stars and rests during the day.
This does not of course, means that she is unmanned during the daylight hours.
Series
- Part 7 of DPxDC Shorts
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Stuck as a Merman, wait...is that a bat? by Adaliah_Tempest
Fandoms: Danny Phantom, Justice League - All Media Types, DCU
05 Jan 2026
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Summary
Danny Phantom was playing around with his powers and got stuck in a new form. It was fun and games till he suddenly got caught by a fruitloop and somehow he's in.... metropolis?
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..
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What if Danny getz yeeted to an alternative universe by silly clockwork who wants nth more than to see him happy? -
Lost the Princess, Found the Prince by IAmTheShpee
Fandoms: Danny Phantom, Batman - All Media Types
02 Jan 2026
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Summary
The adventurers are on a quest: To reach the tower where the princess is being kept and free her from her imprisonment.
Only issue: The princess isn't there, and nobody knows where she's gone. The only lead they have? A young boy of the siren people, who keeps sending them on absurd side quests, and for some reason thinks they're absolutely hilarious.
Series
- Part 59 of Demo’s Mer Obsessions
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Under The Bay, In The Lair by EmeraldsAndAmethyst
Fandoms: Danny Phantom, Batman - All Media Types
25 Dec 2025
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Summary
Danny should really let Sam, Tucker, and Jazz know he's okay. They know he's in Gotham and he's definitely missed one check in.
On the other fin, the hot new mer that just boned him stupid is going to give him a meal and possibly more incredible sex.
Eh, it'll be fine. He'll get back in cell range when he wakes up.
Series
- Part 3 of Mer AU
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Down By The Cave, Under The Bay by EmeraldsAndAmethyst
Fandoms: Danny Phantom, Batman - All Media Types
20 Dec 2025
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Jason wasn’t used to strange mers in his space. This only partially had to do with being the biggest and meanest mer in his territory. It mostly had to do with his territory being so toxic even the King of Atlantis could barely tolerate it. He wished he could say it was surprising when a mer showed up from the city, but Gotham was a hell scape rife with trafficking of all things, including people.
This new mer didn’t die though, and that sparked Jason’s interest.
Series
- Part 2 of Mer AU
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Just because he felt a little colder than usual doesn't mean he can't go to school, right? Back when he was with his parents, he had to go to school like this all the time!
Too bad his new family disagrees.
Series
- Part 58 of Demo’s Mer Obsessions
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Little Shark Boy VS The Internet by IAmTheShpee for deadstart
Fandoms: Danny Phantom, Batman - All Media Types
02 Dec 2025
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Danny has a secret: he has a special set of clothes that turn him into a half-shark half-kid hybrid in the water. His parents are people who've sworn to hunt and destroy all such sea creatures. Naturally living like this is quite stressful, but luckily he's found a really nice scratching post on the sea floor!
First chapter is DP only.
Series
- Part 55 of Demo’s Mer Obsessions
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One year ago, Danny Fenton went missing off of one of his eccentric marine biologist parents' expeditions at sea. They say he dove too deep and never came back up.
He was presumed drowned.
But a year later, a grieving Tucker and Sam discover a mysterious creature injured in the shallows under the boardwalk. As they try to help it, they uncover a mystery that could change everything for the sleepy seaside town of Amity Cove... and, just maybe, that their missing friend isn't as dead as they thought.
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The Only Soul I Ever Saved by DisillusionedDanny for NightShiftShenanigans
Fandoms: Batman - All Media Types, Danny Phantom
24 Nov 2025
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Jason finds an injured merman outside of his nest. Despite their differences, he nurses the merman back to health.
Series
- Part 3 of NightShiftShenanigans Gift Fics <3
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The Axolotl Prince by deadstart for IAmTheShpee
Fandoms: Danny Phantom, Batman - All Media Types
14 Nov 2025
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Alfred was preparing dinner when he heard the sound of quiet thump! come from outside. When he moved to slide open the bamboo door, peculiarly, he found what appeared to be a tiny axolotl larva spinning in the water, thumping its little head against the wall. It blinked sleepily at him with wide, brilliant green eyes.
Well, he supposed dinner could wait a moment.
| Re-write of "The Cat Prince" except with silly little sirens |
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Martha and Thomas venture out into the sea to find their lost son again.
For Cozytober Day 19: Morning Breath Visible in the Chilly Air!
Series
- Part 6 of Cozytober 2024: Sirens!
- Part 61 of Demo’s Mer Obsessions
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When Danny comes across the bleeding out form of a small child, drifting through the water, for a moment he believes the child to be dead. Blood splinters through the water, dark and heady. But it seems like that isn't fate, because the moon is full tonight---and it is inevitable that the child will become a siren.
He doesn't know how he's supposed to handle Damian, the newly siren boy with a lust for blood so strong that it scares him. He wants to try and get the child back to his father... but he can tell the boy is hiding something.
Danny just has to find out what.
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Somewhere, Over the Sadness by IAmTheShpee
Fandoms: Danny Phantom, Batman - All Media Types
06 Oct 2025
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For Cozytober 2025 Day 14: Being Carried Somewhere Safe
But with a twist!
Danny, pushed by his sense of adventure, ends up getting in over his head when a current carries him far from the reef. Further bad decision-making leads him to being stranded on a beach, where an unlikely couple find him.
Series
- Part 3 of Cozytober 2024: Sirens!