As part of a class in map reading, the princesses and princes are given an exercise in orienteering where they must find their way around a course on the ocean floor.

Tensions erupt between the three girls when they discover a young fish that needs taking care of. Each princess feels that she should be the one to look after it and their friendship is sorely tested

Ester has once more failed to deliver her homework on time and Miss Marla's tolerance is stretched to breaking point. She demands a reasonable explanation. Ester takes the easy option and decides to tell a lie!

Ester and Tubarina can't find out what's troubling Polvina. Why does she suddenly fall ill every time they begin to rehearse for the school concert? Polvina faces the challenge of admitting to her problem.

Ester and Marli confidently set out on their first babysitting job. But it all goes horribly wrong when they lose the Sea Lion King's son, Naimo, who disappears in search of his favourite toy.

Ester and Polvina rush to school and smack into the Turtle King; his crown getting knocked right off his head and snapped up by a boat's hook. The girls set out on a mission to retrieve it for the unhappy King.

Polvina and her pet, Tentie, find a beautiful box containing an octopus doll and an indecipherable note scribbled in runes. Will they be able to find someone who might shed some light on it?

Polvina's diary has been stolen, and everyone at school is on the hunt for it. Ester and Tubarina want to help Polvina, but deep down are more intent on reading it to find out exactly what Polvina's secrets are!

Miss Marla is away and the girls have a substitute teacher, Mr Bernardo. Polvina gets off onto the wrong foot with Mr Bernardo, to the point where he thinks that Polvina is the class troublemaker.

Angelica, the Angel Fish Princess, asks the girls if they could look after her pet, Scooter. Tubarina volunteers and Angelica reluctantly agrees. She's worried that Tubarina will be careless when looking after Scooter

The girls are preparing for a shell-sled race against the boys. They crash during a practice run but no one is hurt. Ester doesn't want to practice anymore. Is Ester actually frightened of something?

There's a superstition that if you see a Nautilus, you should make a wish for your best friend. One day, Polvina is lucky enough to see a Nautilus and makes a wish. Now Tubarina and Ester want to know who her best friend is.

The girls wake up to find that the ocean is freezing, thanks to a giant iceberg that's floated right above Salacia. Even though this iceberg is huge, it will eventually melt, but meanwhile everyone will suffer from the cold.

It's Polvina's birthday and Ester and Tubarina have a surprise party for her and also a surprise makeover! When the makeover turns out to be an ugly disaster, Ester and Tubarina have to try and unmake it before the ..

Marli is visiting Tubarina when she spots Tubarina's favourite doll, Bebe. Marli is surprised that Tubarina still has dolls. Under pressure, Tubarina gives her doll up to a charity collection for old toys.

Ester and Marcello are challenging each other to a series of silly dares to see who will back down first. But as they each refuse to back down, the dares become more dangerous.

Lia, the Lion Fish Princess, hasn't been to school for a couple of days. The girls visit the Lion Fish Palace and discover that she's missing. They look for clues to where she could be and seek the help of the Mimic Octopus

Polvina's pet octopus, Tentie, is sick and needs help from the Princesses. Every time he laughs he lets off a thick cloud of ink! Poor little Tentie is very

Tubarina's parents have to go away for a week and this means Tubarina is the senior royal left at home. Ester and Polvina are shocked when Tubarina's personality undergoes a major change. Can they save Tubarina from herself?

The girls are playing with Delfi and her two friends, Ping and Patchy. Another dolphin, Nub, joins them but he isn't what he appears to be. He leads Ping and Patchy into a Drylander trap. Will the girls be able to save them?

Everyone at school is building a float for a parade at the Salacian Carnival. Well, everyone is supposed to be building a float, but Polvina seems to doing most of the work

The Starfish King has a very special gift for the princesses and princes - an old hall that they may use for whatever they wish. Arguments arise between the children as they all have different and competing ideas.

Everyone at school gets a turn at being the Lunch Monitor, except for Tubarina. She wonders why it's never her turn. No one wants her to have a turn because they're afraid the power will go to her head..

The girls and their friend, Elektra, are star gazing one night when a star drops from the sky and into the ocean. When they find the fallen star, they are disappointed. It's not like they thought it would be.

The schoolyard is in uproar as a huge argument takes place. Miss Marla demands to know who started the argument. It seems Tubarina started it, but only after she was hit in the nose with a big ripe Dingleberry!

Ester finds a strange thing that's dropped from Dryland down into Salacia. At first the girls don't have any idea what it could be, until Ester plays around and puts it on her head. It fits perfectly!

Ester thinks love stories are ridiculous. Well, maybe it's not so ridiculous when Ester is struck with a crush for the new boy Caton.

Marcello is looking for an easy way to do a school project. His scheme is to join the right project group where he knows he'll get away with doing as little work as possible. He decides that Soraia's group is perfect!

Why is there no Barracuda Princess? After reading through old histories, the girls discover that there was a Barracuda Kingdom which is now lost. The girls are ecstatic at the idea of searching for a Lost Kingdom

Tubarina's brother, Veto, is coming home. Tubarina isn't overjoyed because everyone's attention is on him. Tubarina discovers a secret of Veto's, but will she really blackmail her own brother?

A gathering of hammerhead sharks is about to take place near Salacia. It's an amazing sight and the girls want to go. They ask Marcello to take them when he goes to the gathering. The trouble is that Marcello isn't ..

Ester loves bringing home stray animals and fish. The Starfish Palace is fit to burst with her friends. Ester's mother, the Starfish Queen, puts her foot down. If Ester brings one more friend home, then everyone has..

Maurico, the Urchin Prince, is looking to form a team in the Flubberball Little League. Ester is the best player around but Maurico refuses to have a girl in his team. Ester plans to form her own team for the League.

There's no better prankster at school than Vivi. No one has ever been able to out trick her. Until now that is, because Ester and Tubarina are determined to be the first. But how can they do it?