What if the mermaids (Cleo, Rikki, Emma and Bella) pull their boyfriends into the moon pool on a full moon. But the story takes a twist when Emma's cousins Ashly, Claire and Austin come and stay with her family. Emma starts to notice something weird. are they hiding something? Read to find out Disclaimer: I do not own H2O Just Add Water.

Zac has to keep his secret a secret when his older sister Jessica comes home from collage and is planning on staying a year. What happens when the full moon rises will his secret be lost? read to find out. Disclaimer: I do NOT own Mako Mermaid