What must the girls avoid doing during a full moon or risk losing control?
Looking directly into the moon's reflection
Name the actress who played Emma Gilbert.
Claire Holt
Who is Cleo's love interest throughout the series?
Lewis
What natural event first triggers the girls' transformation at the Moon Pool?
A full moon
What is the name of the show's theme song?
"No Ordinary Girl"
Whose power allows turning water into a gelatin-like or crystalline substance?
Bella's
What is Nate's role among Zane's friend group, and what hobby is he bad at?
One of Zane's friends; he sings, badly
Who does Rikki have an on and off relationship with?
Zane
How do the girls first end up stranded on Mako Island?
Their boat drifts out to sea and runs out of fuel, carrying them toward the island.
What year did the show first premiere?
2006
Out of the three original girls, who discovers their mermaid power first?
Cleo
What actress played Bella Hartley?
Indiana Evans
In season 2, who steals Lewis away from Cleo?
Charlotte
What sits above/around the Moon Pool that makes it geologically unusual?
It's inside a dormant volcano
How many total episodes does the series have across 3 seasons?
78
What does Rikki's power eventually expand to control, beyond boiling water?
Fire and lightning
What position did Cleo apply for at the marine park in season 3?
Assistant dolphin trainer
Who does Bella fall for in season 3?
Will
In season 3, what do Bella and Rikki find embedded in the walls of a moon cave?
Moon crystals
Name three locations the show was filmed...
Sea World, Gold Coast — the Moon Pool scenes were actually filmed in Sea World's water park
Gold Coast, Queensland — general beach, harbour, and outdoor scenes around town
Currumbin Rock Pools — various rocky coastal locations, Mako Island's exterior shots
Somerset College — school scenes
What happens to Zane the night Rikki accidentally burns him under the full moon's influence?
He falls unconscious from dehydration
What does Zane glimpse as he's about to black out during the Lorelei's explosion, sparking his obsession with "sea monsters"?
Emma's mermaid tail, specifically described as a "mermaid with red hair"
Who was Emma's love interest introduced later in the show?
Ash
What celestial object threatens Earth in the season 3 finale, connected to the moon cave crystals?
Comet Eva
What real-life challenge did the cast face while filming underwater scenes due to their costumes?
The mermaid tails made it very hard to swim. Off camera, they were heavy/restrictive, so mini cranes were used on set to lower the actors in and out of the water for underwater filming.