Experiencing occasional visions of the future, mermaid Kiki Coral receives a psychic warning that her classmate, Rocky Ridge, will have a dangerous encounter with a giant leatherback turtle, a premonition she fears nobody will believe.

"In this reinvention of Hans Christian Andersen's classic tale, a little mermaid trades her voice for legs and makes a new friend on land, but must return to the sea to save her family"--

Of all the creatures in the ocean, sea horses are Echo Reef's favorite. They're sweet and gentle and they glide through the water so gracefully. When Echo discovers that Rocky Ridge, one of her Trident Academy classmates, has his own pet sea horse, she wants one right away. Not everyone agrees sea horses should be pets, however. Perhaps they are happiest when swimming freely. But Echo thinks that if Rocky can make a sea horse happy, she can too! Can't...

A little girl dreams of adventures in the water and feels the spirit of the ocean all around her ... even though she lives on the prairie, with flat land as far as the eye can see. But she won't let a little detail like that stand in the way of being a meadow mermaid! Frolicking in the "waves" of wheat and "oceans" of grass, spying sea horses and ... a shipwrecked sailor? Even if that shipwreck is actually an overturned bike and the sailor a new...

Ariel is a mermaid who always wanted to explore life on land. After making a deal with the sea witch, Ursula, Ariel has a chance to go to the human world. There she meets Prince Eric, who takes her on an adventure around his island village. Will Ariel be able to break Ursula's enchantment and find her voice before it is too late?

Misty and five fellow mermaids, on a quest to retrieve six magic crystals that will protect the Coral Kingdom for the next year, face a storm sent by the evil Mantora and are driven off-course to the Kelp Forest, where they find a different kind of trouble.

Oona the mermaid is friends with everyone, but when her attempts to befriend a shark with sensory issues fail miserably she realizes what may be fun for her may be overwhelming for him.

Ariel is fearless: Ariel and Flounder must find night lillies to bring back to Andrina. Jasmine is helpful: Jasmine finds out the market is falling apart and wants to build a new one.

Oona and her best friend Otto love to search for treasure...and often find trouble instead. Messy trouble. Tricky trouble. Even shark-related trouble. That's never stopped them before, though! After all, no proper treasure hunt is without some adventure. But when the grandest treasure yet is stuck in a deep, dark rift, Oona's not sure if she can dive right in. What might be waiting for her in those unknown waters?