Mako Island is a fictional location from the Australian television series H2O: Just Add Water. It is known for its beautiful beaches, lush vegetation, and mysterious waters. The island is home to a magical moon pool that grants special powers to those who come into contact with it during a full moon. In the series, three girls—Cleo Sertori, Emma Gilbert, and Rikki Chadwick—transform into mermaids after swimming in the moon pool. The island serves as a central setting for their adventures and challenges as they navigate their new identities and the secrets of the ocean.