How old were cleo Rikki and Emma when they were mermaids?

Cleo, Rikki, and Emma from the series "H2O: Just Add Water" were all 16 years old when they became mermaids. Their transformation occurred after they came into contact with water from the Moon Pool, granting them the ability to turn into mermaids and giving them special powers. The show follows their adventures as they navigate their new lives and the challenges that come with being mermaids.