The girls wake up to find that the ocean is freezing, thanks to a giant iceberg that's floated right above. Even though this iceberg is huge, it will eventually melt, but meanwhile everyone will suffer from the cold. / Gummy, Tubarina's pet shark, has got himself overweight.The girls have got to help Gummy lose weight so they ask for the help of two dolphins to be Gummy's personal trainers.

The Sea Princesses are cheerful, adventurous and irrepressible young girls doing what they can to care for all the life forms that live under the sea. / 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.

The girls are playing with Delfi and her two friends, Ping and Patchy. Another dolphin 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...

Lia 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. / Everyone at school gets a turn at being the Lunch Monitor, except for Tubarina. No one wants her to have a turn because they're afraid the power will go to her head...

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 shellsled race against the boys, but Ester decides she doesn't want to practice anymore. Is Ester actually frightened of something?

The Sea Princesses are having to go the long way to school to avoid two very grumpy turtles. Tubarina decides that she will bring the two turtles together, because they're probably just lonely. / The barracuda, who are normally scary, are swimming around Salacia. Something strange is going on. Could this Drylander swimming with the barracuda be the descendant of the Barracuda sea princess?

Polvina is asked to write a review of a ballet concert that Ester and Tubarina are dancing in. Unfortunately, the two princesses are clumsy dancers and they end up destroying the set. / Every time Ester gets angry with Marli bad things happen. Polvina and Tubarina tell her she's creating bad vibes. She decides she must try to think of something nice to say to Marli, and break the bad vibe spell!

Bia sends a note to the princesses telling them she's coming to visit. They're delighted but Marli and Vivi are not. They've heard that Bia from the Abysmal Kingdom is a strange creature who walks weirdly. / The three princes have started a band so they can enter a competition. Tubarina, Polvina and Ester decide they'll start a flute-playing band, and try to beat them.

It's Salacia Day and every year Ester's grandmother knits her an embarrassing red beanie, which she loses so she can wear something much cooler. This year, she replaces it with a headband, just as her grandmother appears. / Polvina is doing the boys' homework again and Ester and Tubarina have had enough. They're going to help Polvina be bad instead of good for a change.

Ester spots a dolphin with some drylanders and decides to rescue it. / Drylanders are exploring nearby, and the sea princesses realise they need help from some tiny shrimps.

Miss Marla asks Polvina to help the dreamy Angelica study for her geometry test. / Caramelo the Sea Snail Prince goes in search of an adventure.