After Sebastian gets kidnapped by some pirates Ariel has to relie on her new bird friend to help her rescue him, but a question of trust is at matter as they start to share a common bond with their new friend Scuttle.

While King Triton's away Sebastian will play. Ssebastian's parents come over,and he lied to them telling them that he is the king of Atlantica. All goes well until King Triton comes home, but when things seem confused Urchin, Ariel, and Flounder get Sebastian out of this mess.

Once again Sebastian gets kidnapped, but this time a mad scientist kidnaps Sebastian for his crab experiments.

Ariel suggests that her family takes a trip up to the frozen north, but something else lies beneth the ice. Dinosaurs, and Ariel thinks that they're adorable so she free's them with her father's triton, but they seem more harmful than adorable. Later on King Triton stops them and after that he uses his triton to destroy all the ice and discover the dinosaurs' home. Now the dinosaur's can roam the land freely thanks to Ariel's curiosity.

King Triton, and the other residents from Atlantica are very happy to know that their hero Apollo is returning to Atlantica. Ariel and Flounder ask Triton who he is, and Triton explains. 20 years ago Atlantica was in a battle between the Octipins who contained a triton that was more magically than King Triton's triton. Apollo, in the vines snuck up on them and broke it. After the story Apollo appears. He and Ariel go on an adventure, but Ariel and Flounder soon find out that his victory over the Atlanticans was an accident. Ursula revives the Octipins and gives them 8 magic tritons, and now Apollo becomes a hero for real.

On one of Ariel's adventures makes Flounder turn into a howling hairfish. They go to a magical fish and she tells them that the cure its to be srowded in silver. There's no such thing as silver under the sea, so Ariel uses silverfish instead.

Ariel treasures her items from the humans of above. She shows her items to Gabriella and she loves them too, but someone else saw Ariel's treasures to. Ursula, and now she's using her evil spells to take control over Ariel's treasure's so they can destroy Atlantica.

The Evil Manta has an evil son who wants to follow in his father's evil footsteps, but he shows signs of good. Ariel finds him, and tries to bring that good out of him.

A poor merboy named Urchin tries to make friends in Atlantica, but when he meets the wrong friends( The Lobster Mobster Squad) it takes a good friend like Ariel to set him right.

Ariel and her friends have to babysit some baby mertwins, but when they cause mischief they provide Ariel with some double trouble.

A lonely dragon writes a message in a bottle. Ariel finds it and visits him, he decides to come to Ariel's house but King Triton won't allow it until he saves them from some evil sea creatures.

Ariel finds a beautiful human bracelet, and when she wears it she can't take it off. Knowing that her father hates human things she decides not to go home until she finds the key to take it off.

King Triton thinks that Ariel and Prince Thor would make a perfect couple, but not Urchin so he plays tricks on Thor to make him change his mind about Ariel. The prince gets exasperated and tells his kingdom to have war with Atlantica. Urchin stops it, and Triton explains that he wanted Ariel and Prince Thor to be a couple in the olympic sea games.

The city of Atlantica is a wonderful place to live in, but when Ariel releases an evil manta from imprisonment he spreads the path of prejudice for the creatures of Atlantica. Everybody separates from each, but Ariel and Flounder stay together and work things out in Atlantica.

Ariel and her big sister Arista get into a big arguement, so they can't go to the carnival. Everything gets all out of hand but when some gators try to rob the kingdom Ariel and Arista learn the true value of sisterhood and teamwork.

After overhearing King Triton talk about him Sebastian thinks that he got fired as the King's trusted advisor. He searches for a new job but gets rehired in the end.

King Triton wants Ariel to learn how to play the calliope, but Ariel wants to learn how to play the harp. She tries to learn the calliope and her bad playing wakes up an old ancient evil sea monster.

Spot the whale returns and before Ariel and the others can rejoice the circus people take him away to join the act with all the other abused animals.

Ursula's evil spells haven't been working lately because of a bad luck creature. Ariel finds the creature and brings him home, but Ursula still wants to destroy the bad luck creature and whoever owns him.

Ariel laughs at everything, even things serious so a sorceror blowfish cast a spell on Ariel so when she laugh's seaquakes will rise.She gets sick of it so when she meets up with thisblowfish she teaches him the power of laughter.

Ariel wants legs so she can dance but no one believe's in her dream. She gets discouraged until she meets another mermaid called Gabriella who wants to sing so they go to a magical starfish who can make their dreams come true.

Sebastian's old perfect friend from his childhood comes to town. When Sebastian gets angry because he's so perfect, Sebastian becomes a pawn in Ursula's plan to take over the kingdom.

Ariel wants to learn more about humans, so she goes to a humanalogist who makes her day when he tells her that a human is coming under the sea in a metal submarine shaped like a fish.

Sebastian is sad because he's a little crab, so Ariel goes to a cave where she becomes a sea witch. She puts a spell on Sebastian that makes him big, but the bigger Sebastian gets the less room their is for everyone in the sea.

Prince Eric drops one of his boots down to the sea, and when Ariel finds it she thinks its a wonderful human thingamajigger, but Triton thinks its dangerous. Soon terrible things start to happen and every sea creature thinks that the thingamajigger is the cause, so every bad guy wants it to take over Triton's kingdom, but Ariel goes to the surface and finds out what they really do.