1 - 20 of 696 Works in H2O: Just Add Water
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Lihue, Kaua’i, 2016. A young girl finds herself in the middle of a complicated mystery as she tries to track down a mermaid in danger with the help of a new friend on the run.
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Trigger warning. Suicide attemp and a death. With Rikki breaking up with him, all Zane's frustrations with himself come to a head and can't take it anymore. He tries to take his own life, but Rikki talks him out of it. After everything, Sophie is mad that her plan didn't work, but soon realizes how pushy and manipulative she is, she ends up being killed. Read at your own risk.
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On the night of the Lunar Eclipse, what happens when 4 unsuspecting boys find their way into the moon pool, with no mer to temporarily draw power from, the boys find themselves split between human and fish in more ways that the girls have ever been. Old enemy's return, families torn apart, secrets uncovered. They might just have to leave the land above behind, permanently.
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Emma Gilbert is in medical school in Sydney. A casual swim results in a run-in with an old nemesis. Will Emma's secret be exposed? Will Denman finally capture a mermaid to further her career? How will Emma handle this now that she's on her own with no friends to help out? Emma never thought she'd have to do the things she did. Is turning to crime something she ever expected to have to do? No, but here we are.
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Zane give Harrison an ultimatum and leaves to go to comfort Rikki
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Sons of the Ocean by Mistletoe19
Fandoms: Mako Mermaids, Percy Jackson and the Olympians - Rick Riordan, H2O: Just Add Water, The Heroes of Olympus - Rick Riordan, Percy Jackson and the Olympians (TV 2023)
06 Oct 2025
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When Percy and his family visit their long lost cousins in the Gold Coast, something feels off. The Blakelys’ son, Zac, is definitely keeping secrets from his parents and seems to have some strange affinity with water. Could he be another son of Poseidon?
Meanwhile, Zac can’t help but feel that there is something fishy about Percy, who always appears dry after a swim and who is also definitely keeping secrets. Could he possibly be another merman?
A Percy Jackson x Mako Mermaids crossover that imagines the shenanigans that might happen when the worlds of a merman and demigod collide. Will Zac and Percy be able to keep their watery secrets from each other?
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A Great Lakes Moon by Lockheed_Tvr
Fandoms: H2O: Just Add Water, H2O: Just Add Water - ish
05 Oct 2025
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Eleven-year-old Kim Callahan keeps to herself and likes hanging out at Lake Erie. When a rare set of astronomical and atmospheric events line up, her life and the lives of those around her will never be the same - and not just because middle school is starting soon for them. A tail of magic and friendship.
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bejeweled broken comb caught in mermaid tangled hair by Blue_Inventations
Fandoms: H2O: Just Add Water
05 Oct 2025
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When Cleo is invited to a party by her new lab partner, a charming and handsome boy named Jeremy, she sees it as a chance to move on from Lewis. If he could do it, why not she? Besides, he had been ignoring her lately. Cleo will have to contend with her decision to go, even against her friends' advice, as she is flung in way over her head. She learns that perhaps Lewis and Charlotte are the least of her problems as she faces a new danger like never before.
Title from "Shark" by Ruby Throat
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With a smooth motion, he reached for the hilt and yanked the dagger out. Rebekah gasped, her eyes flying open. Breath came in a ragged gasp as her lungs exercise breathing again.
"Kol," she whispered hoarsely. "Why?", Eyeing her youngest brother suspiciously.OR
What if Kol wakes Rebekah and she flees to Australia and lives under a new identity: Emma Gilbert.
The story of an Alternate Universe where the events of The Originals (TVDU) take place in the same world as H20: Just Add Water. -
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Isabella Hartley’s life is flipped upside down after an unexpected journey through the sea cliffs of Ireland. Through trial and error, she learns how to navigate her new life and new abilities, lessons of which she takes with her all the way to the Gold Coast. (Bella’s Backstory)
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Sonic's Green Hills Adventures Season 6 by AlluraTheTitan
Fandoms: Sonic the Hedgehog (Live Action Universe), Invader Zim, H2O: Just Add Water
05 Oct 2025
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Just months after the Multiverse mayhem, Sonic and his friends face a new threat: an alien titan burdened by power, scars, and a story none of them are ready for.
Disclaimer: The series "Sonic's Green Hills Adventures" doesn't belong to me. Go check it out MarinaMelody (https://archiveofourown.org/series/4011130) and read the other 5 seasons or listen to them on her YouTube channel (https://www.youtube.com/@MarinaMelody-sw1ck)
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Years have passed since Emma, Rikki, and Cleo have last seen each other. They have moved on from the time they had together in the Gold Coast to pursue careers and families. When each of their daughters is 16, something-- perhaps magic-- brings them all back to the town in which they grew up. Emma, Rikki, and Cleo are now forced to face each other again and work through the past that resulted in their separation for the sake of their girls while also keeping their biggest secret from their own children.
(Updated every other weekend)
This work uses NO AI and is my own work. PLEASE do not steal, republish, or plagiarize. Posting on other platforms will be done by ME (dustystar). (Fun fact: I actually handwrite pretty much the entirety of this fic because it helps with writer's block and lets me write in public without feeling awkward, highly recommend.)
No unsolicited criticism please <3
If you'd like to see me post fanart or answer questions follow me on Tumblr @dustystar11 :)
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Five girls, three moon pools, one big secret. Ellie, Lucy, Amy, Callie and Jay are thrust into the world of mermaids. The five of them could not be more different, but to deal with this together, an unlikely friendship will form. Especially when they come to realize there are more than just magical moon pools at play.
Or,
Years ago I wrote a story on another platform. Back when I had no idea what paragraphs were. I didn’t do my characters justice, or my plot ideas. It’s been a long time, but I’ve missed these characters, and I hope I can do them justice now.
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Cleo wasn’t lying when she said she couldn’t swim. She drowns, and she takes Emma and Rikki with her. The moon gives magic to corpses.
When they return, there is nothing gentle about them.
AKA Emma, Rikki, and Cleo become sirens.
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Years after the events of the final season, three girls find themselves in a familiar magical predicament after a moonlit night on Mako Island. As they adjust to their new lives, they unravel the mystery of what happened to those before them; all while they fight a new foe.
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His Mermaid || Edward Cullen by MerLynn97
Fandoms: Twilight Series - Stephenie Meyer, Twilight Series - All Media Types, Twilight (Movies), H2O: Just Add Water
01 Oct 2025
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Edward Cullen was left devastated by Bella Swan's infidelity, having found her tangled up in the sheets with her best friend, Jacob Black. Nearly two decades later, and he was still reeling from the effects. He was numb, speaking only when spoken to and counting leaves in his spare time, which, according to him, all his time was 'spare'.
But what happens when the Cullens find themselves moving to the Gold Coast of Australia? What happens when Edward notices a certain blue-eyed, golden-haired girl who shares the same name as the girl that broke his heart all those years ago? What happens when he finds himself drawn to the charming, mysterious girl, despite his best efforts to steer clear of her?
What happens when he comes to find out that Bella Hartley and her friends share a secret of their own?
What happens when vampires and mermaids collide?
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"You're so... secretive," Edward mumbled bitterly, shaking his head in obvious annoyance.
I narrowed my eyes at him on reflex, growing tired of his sour expression and biting comments.
"You're one to talk," I quipped, folding my arms across my chest and resorting to staring out the window, ignoring his incessant, curious stare.
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Infinity Crisis: The Heroic Mermaids of Gold Coast by Anonymous
Fandoms: G.I. Joe - All Media Types, H2O: Just Add Water
28 Sep 2025
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Co-Written by Movie-Brat. One shot. Cleo, Emma and Rikki's new time as superheroes are put to the test as they encounter visitors from another universe, a ruthless terrorist organization determined to rule Earth-38. But it will take the efforts of the superhero trio to take them down.
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“Look. We keep doing this. You say it won’t happen again. I say it’s already happening. So here’s an idea...”
“No.”
“You haven’t even heard it yet.”
“I already know it’s going to be dumb.”
“Let’s make a deal.”
She stared at him. “A deal?”
“Yeah.” He stretched, completely unbothered. “Just sex. No strings. No feelings. No dating. We do what we’ve clearly got zero self-control about anyway, but without the guilt trip after.”
“You’re out of your mind.” -
A Modern Mermaid in Westeros by Spade_Storm
Fandoms: H2O: Just Add Water, House of the Dragon (TV), A Song of Ice and Fire & Related Fandoms, A Song of Ice and Fire - George R. R. Martin, Game of Thrones (TV)
25 Sep 2025
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Rikki Chadwick had just been going to the moon pool for another full moon.
She had stopped by for a short visit. She did not plan for that short visit to leave her in a world she's only seen on tv or read about.
Worse, she's a teenager.
Worse than that, there is this really cute dragon that she really does not want to leave by itself.
Well, fine then! She'll just have to make do.
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Between Reefs and Rooftops by Stellar_Panera
Fandoms: Batman - All Media Types, H2O: Just Add Water
25 Sep 2025
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Tim isn't having a good time. Right when he thought things couldn't get any worse, they did. After getting injured and almost drowning, he now has to deal with a new issue from his strange experience in the cave he fell in. Tim found out that keeping his vigilante identity is child's play compared to whatever is causing him to turn into a half-fish.
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Tim falls into a moon pool at just the right time and now has to keep himself from being found out by not only his friends (because of the headaches they will cause), but also his enemies.
How long can he manage to avoid water and keep this from the family and others? (except Alfred, he knows all!)