Season 1

To save her kingdom, a determined young mermaid princess and her friends must join forces with the creatures that scare them the most — humans.

Episodes

Each episode has its own detail page.

Episode 127 min2024-08-22

The Pearls of Neptune

When the pearls powering Mertropia start to fade, Princess Merlinda must break the rules and swim beyond her mermaid home to save her father's life force.

Episode 226 min2024-08-22

Pirates' Cove

Nerissa and Sasha look for Merlinda on land. But with her communication bracelet broken, the princess will have to trust her new human friends.

Episode 326 min2024-08-22

Dark Secrets Beneath the School

Celia and Tyler help Merlinda, Nerissa and Sasha adjust to their new school above the surface and try to find answers about their missing map.

Episode 426 min2024-08-22

The Guardian of the Pearls

A whale rescue leads Merlinda and her friends further on their quest to find more pearls — but danger is waiting below the surface.

Episode 526 min2024-08-22

The Haunted Ride

A day at the amusement park proves relaxing — and perilous — when the gang's greatest threat makes an appearance. Alex sets out on his own mission.

Episode 626 min2024-08-22

Danger at Marine Rescue Center

While Merlinda, Nerissa and Sasha use their powers to help Tyler and Celia save the rescue center, Barbarossa and Tempesta concoct a plan of their own.