Ep 7. Moon Spell

Three teenage girls, Emma, Cleo, and Rikki, come across a hidden and mysterious pool on a full moon night. Upon swimming in it, they become mermaids with unique powers. In season 1 episode 7, titled "Moon Spell," the girls must deal with the effects of the full moon on their supernatural abilities.

As the full moon approaches, the girls each sense a change in their powers. Cleo's ability to control water becomes more difficult to control, Emma's power to freeze water becomes more powerful, and Rikki's ability to heat water completely disappears. The girls are confused and concerned about the sudden shift in their powers, and worry about how they will continue to function without their full set of abilities.

In addition to dealing with their powers being influenced by the full moon, the girls also face personal troubles. Cleo struggles with jealousy when she sees her ex-boyfriend spending time with another girl, Emma is dealing with unresolved feelings for her former boyfriend, and Rikki is struggling to fit in with her new group of friends. Each girl is dealing with their own unique problems, adding an extra layer of complexity to the already precarious situation they find themselves in.

As the full moon reaches its peak, the girls must face a dangerous situation. A group of poachers have arrived at the marine park and are attempting to capture a rare species of sea turtle. With only a partial set of their powers, the girls must work together to stop the poachers before it's too late.

"Moon Spell" is a thrilling and suspenseful episode, with plenty of action and heart-warming moments. It showcases the girls' unique powers and the strength of their friendship, even in the face of adversity. Viewers are sure to be left on the edge of their seats as they watch the girls navigate their way through this challenging situation.