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1. The Pull Of The Tide by ayalovesmoony

   Fandoms: Harry Potter - J. K. Rowling, H2O: Just Add Water, Mako Mermaids  

   • Not Rated
   • No Archive Warnings Apply
   • Multi
   • Work in Progress

   30 Jan 2026

   Tags

   • No Archive Warnings Apply
   • Regulus Black/James Potter
   • Andromeda Black Tonks/Ted Tonks
   • Sirius Black/Remus Lupin
   • Minor or Background Relationship(s)
   • Regulus Black
   • Sirius Black
   • Andromeda Black Tonks
   • James Potter
   • Remus Lupin
   • Peter Pettigrew
   • Lily Evans Potter
   • Mary Macdonald (Harry Potter)
   • Marlene McKinnon
   • Ted Tonks
   • Barty Crouch Jr.
   • Evan Rosier
   • Pandora Lovegood
   • Inspired by H2O: Just Add Water
   • Mako Island (H2O: Just Add Water)
   • Alternate Universe - H2O: Just Add Water Fusion
   • Moon Pool (H2O: Just Add Water)
   • Regulus Black & Sirius Black Have a Good Relationship
   • POV Regulus Black
   • Sirius Black Needs a Hug
   • Protective Sirius Black
   • Alternate Universe - Modern Setting
   • Modern Era
   • No Smut
   • Supportive Andromeda Black Tonks
   • Desi James Potter
   • Implied/Referenced Child Abuse
   • James Potter is Bad at Flirting
   • James Potter is a Tease
   • Regulus Black is Bad at Feelings
   • Peter Pettigrew is a Marauder
   • Marauders Era (Harry Potter)
   • Marauders
   • Marauders Friendship (Harry Potter)
   • Tags Are Hard
   • Barty Crouch Jr. is a Little Shit
   • Chaotic Barty Crouch Jr.
   • Pandora Lovegood and Evan Rosier are Twins
   • Evan Rosier is a Little Shit

   Summary

   When young cousins Andromeda, Sirius, and Regulus wander into a mysterious pool deep inside a volcano during a full moon, they stumble into something magical, something that changes them forever. The next morning, they discover that touching water turns them into mermaids and a merman.

   Ten years later, Sirius and Regulus escape their abusive family in England and return to Australia, where Andromeda welcomes them into her home. As they settle into a new school and a quieter life, they begin to notice something strange about a boy named James Potter, he's always avoiding water. Suspicious and curious, Sirius and Regulus begin to wonder: could James be like them?

   Secrets, saltwater, and new beginnings await as the mystery unfolds.

   Language:

   English

   Words:

   19,799

   Chapters:

   7/?

   Comments:

   6

   Kudos:

   33

   Bookmarks:

   5

   Hits:

   682