Meeting Rita

S1 E3: The mermaids are worried about Zac- he may find them and the Moon Pool. Then no mermaid is safe! Attempting to capture Zac in his natural environment, Lyla, Nixie and Sirena follow him to a foreign place... his school. But he is always with his friends, Evie and Cam. To get Zac alone the mermaids use their magic to make him feel ill, but they accidentally manipulate a water fountain, forcing a wet Zac to run off to hide while he transforms into a merman. Luckily, he manages to dry himself off before Evie discovers him with a tail. The mermaids' plan to catch Zac is interrupted when the school principal, Rita Santos, confronts them and confiscates Sirena's Moon Ring. An upset Sirena is determined to get her sister's ring back, so the mermaids tail Rita home to retrieve it. There's no sign of Rita as they wander around the house, but the mermaids are confronted by Posedidon, Rita's 'fisheating' cat... and they discover a secret pool under the house. As the mermaids determine the pool is saltwater, Rita suddenly surfaces, in full mermaid form. Principal Santos is a mermaid! Rita explains that she was banished from her pod for falling in love with a land dweller. Not only does Sirena get her Moon Ring back, but the girls convince a begrudging Rita to help them in their quest to fix Zac.