This is a canonical timeline linking the events of H2O: Just Add Water and Mako Mermaids.

Madeleine Hawkins is a sweet, young girl with an unfortunate disease known as Aquagenic Urticaria, or more commonly known as being allergic to water. All water, no matter the temperature or amount, has to do is touch her skin and she breaks out in hives, even her own sweat and tears cause a reaction. One day, despite her condition, Madeleine sees two guys in the year above her trick a girl into getting into a broken boat before shoving it out to sea. Madeleine knows she has to do something and dives into the water and climbs into the boat. However she is unable to do much as she begins to break out in hives and pain erupts all over her body. She introduces herself to the girl, Cleo Satori. One of her close acquaintances, Rikki Chadwick, manages to come in and save the day while also relieving some of Madeleine's pain. They pick up Emma Gilbert before deciding to take an amazing boat ride. However they run out of fuel and get stranded on Mako Island, none of them realize that after that day their lives would be forever changed.

Reanna Masen has moved once again, but this time ending up in the Gold Coast. After one magical event, she befriends three girls that would share the same secret. How will her life play out when she has to keep a certain fishy secret from her family while making sure she doesn't become an experiment herself?

Madeleine Hawkins is back with her mermaid and mermen pals. Here's to a new season of adventures with a secret that needs to be kept! Sequel to The Youngest Mermaid. Please read that one first so that you know what's going on and can bond with the main OC. I only own my OCs

Leona Ramirez had never known an easy life, growing up on the streets of the Gold Coast. But one day when she catches a ride to Mako Island with three girls from her high school, she finds herself with more than she bargained for...including a new tail. As a newfound flirtation with bad boy, Zane Bennett, heats up, it makes her wonder: will she be able to keep her mermaid life a secret? 🏆 #1 in H2O: Just Add Water 🏆 #1 in Rikki Chadwick 🏆 #1 in Emma Gilbert 🏆 #3 in Cleo Sertori 🏆 #4 in Alycia Debnam-Carey Copyright 2018 © All Rights Reserved [Zane Bennett / OC] [H2O: Just Add Water] [Season 1] Cover by @QueenMimi96

Will Johnson has a big secret. He is a merman. When he moves to the Gold Coast of Australia, he meets three girls named Cleo, Rikki, and Emma. They become fast friends. The funny thing is, the girls were just recently turned into mermaids. Does Will find out? What happens if he does?

The reason this book is called season three instead of two is because it goes by year. Season 1 is 1955, Season 2 is 1956, (Which has been mentioned, I'm not good at writing tons of filler, which is why it's only mentioned) and Season 3 is 1957. With that cleared up, let's get to the premise! These three girls have been through a lot together. Becoming mermaids, saving Carl and nearly being exposed by him; but they've gotten through. When their best friend Max starts dating Gracie, things change drastically. The experiments he's been doing wears on all of them, and strains on his friendship with Julia and Louise, and his relationship with Gracie. Three lockets are made to fix this. Find out the details of that and more.

Kate Damon wasn't expecting anything to come out of her move to Australia. She would continue to be the outcast in school with no friends, the straight A student and write stories to herself. She is all wrong when her perky neighbor, Avery introduces Kate to Jamie and Luke. Luke decides to adventure and explore the mysterious island they call Mako. After a strange night there, the fairy tales that Kate was told to as a kid about mermaids come true and she is one of them.

Rewrite of H2O! I don't own it! But I will be skipping the first three episodes since those are basically the "Everyone get used to the mermaid thing!" kind of episodes. Also since I am skipping those episodes, I will give you the information that I have. Ricky is a guy and has a sister and Ricky is actually able to sing and so can his sister. Bella is already there and in season three no one will be leaving except Lewis. Thank you! Hope you enjoy!

After getting stranded on an island, Harry, Zayn and Niall realize that from a touch of water, they instantly turn into mermaids. [Based off 'H2O: Just Add Water]