The effects of the full moon turns Emma into a carefree, wild mermaid. At her father's birthday party she's the opposite to her usual, organised self. Can the other girls stop her before all is revealed?
Rikki gains an admirer in Emma's younger brother Elliot when she saves him from drowning. She lets him down hard causing him to run away and hide in the fernery. The girls find him just as the watering system is about to start.
Kim reads Cleo's diary and finds evidence of mermaidness. She spies on the girls and decides Miriam is the head mermaid. Miriam and Cleo enter the Queen of the Sea contest where Kim tries to prove her theory but only succeeds in upsetting Miriam.
Tara finds a new hero in Saskia Duncan, the youngest principal dancer in the Company's history, and a new worry about her future with Christian. Meanwhile Abigail searches for dirt to remove talented Grace from second year.
Tara reunites with her friends for second year at the Academy and discovers the exciting news that they can compete in a prestigious ballet competition to determine the best young dancer in the world.
Jana must decide where she belongs.
Jana's mission to the wild pack ends in disaster.
Kuru warns Alex the powerful royal rune to shift time back in order to change things has only been used twelve times for extreme emergencies. Reasoning one wouldn't know if the royal user doesn't tell, the scamp keeps abusing it for petty accidents all day when Marcus finally asks her on a real date.
Many weeks after the boat was discovered in the cane field, no clues have been found and no further message from Lumina has come.
The full moon is once again upon Mako and the mermaids have to stop Zac from getting the all-powerful Trident. But the full moon draws Zac to Mako.
Sirena is collecting shells on the reef when she sees merman Zac. Luckily, she torpedoes away before he recognises her. But it's not enough - Zac saw her tail.
Determined to live her life as normal, Cleo confronts her fears and lands a job at the Marine Park, helping out to feed the dolphins. Despite her precautions, she gets splashed and, just as she's about to turn into a mermaid, a mysterious Old Woman, Miss Chatham, comes to her rescue.
When Emma and Rikki save a sea turtle from a fishing trawler's net, they are mistaken for sharks. A shark hunt ensues. Cleo, getting over her fear of water, saves another turtle, but she is trapped.
Annoying Miss Popularity, Miriam, is having a pool party that the girls don't want to miss. But it's a risky activity for three mermaids: their secret could be out. Spurned by Lewis, Rikki discovers her mermaid power is to boil water at will!
Cleo and Emma meet new girl, Rikki, and find themselves stuck on Mako Island where they are transformed into mermaids. As well as growing tails, the girls find they have powers over water.
Tara finds a new hero in Saskia Duncan, the youngest principal dancer in the Company's history, and a new worry about her future with Christian. Meanwhile Abigail searches for dirt to remove talented Grace from second year.
Tara reunites with her friends for second year at the Academy and discovers the exciting news that they can compete in a prestigious ballet competition to determine the best young dancer in the world.
Jana must decide where she belongs.
Jana's mission to the wild pack ends in disaster.
Kuru warns Alex the powerful royal rune to shift time back in order to change things has only been used twelve times for extreme emergencies. Reasoning one wouldn't know if the royal user doesn't tell, the scamp keeps abusing it for petty accidents all day when Marcus finally asks her on a real date.