H2O: Just Add Water

Three teenage girls discover an underwater cavern on Mako Island and undergo a magical transformation.

The girls are trying to keep their fish tails a secret, but when socialite Miriam throws a pool party, all they can do is try to stay dry.

When the girls learn that sea turtles are getting caught in nets, it's Rikki and Emma to the rescue. But fishermen think they've got a shark problem.

While deciding to throw her annual sleepover party, Emma heads to Mako Island in search of a clue.

When Cleo's little sister gets ahold of Cleo's diary, she threatens to expose the three friends' secret.

Emma's younger brother, Elliot, develops a crush when he's saved from drowning.

A mysterious woman warns Cleo to steer clear of water and avoid looking at the full moon.

When Lewis takes a job as a research assistant to a noted marine biologist, the girls are worried that he might accidentally give away their secret.

When Rikki tries to catch a fish for Cleo, she takes on a job offer from a breeder to collect rare fish that isn't what it seems.

The girls participate in a film contest but the heroic theme leaves the group at odds.