Fourteen-year-old mermaid princess Lana reluctantly visits her mother on land for the Royal Festival after her mermaid-father appoints her a royal ambassador, but when an earthquake strikes back home and Lana is forbidden to go back home, she discovers nefarious forces may be at work against her kingdom.

Kiniro the mermaid wanders into a house made of seashells and coral and makes herself comfortable, but the Octopus family is not happy to return home to find Kiniro sleeping in Baby Octopus's bed.

"A gorgeous and vibrantly illustrated field guide cataloging various species of mermaids, based on real ecological details--with a strong environmental focus"--

Shelly is a princess! A real princess! It's been a well-kept secret in Trident City, but now the word is out, and Shelly doesn't know how to act! Should she start wearing a glittery crown? Or move to a grand undersea palace? Will her friends have to call her Your Highness? Being a princess may be exciting, but Shelly's not sure she can truly play this royal part.

Mermaid Echo is doing tail flips because she's going to see her favorite under-the-sea band, the Rays. Everyone is invited except Echo's best friend.

"To celebrate the rise of their new queen, three goddesses of the moon created three stars, one of fire, one of ice, one of water. But then they fell from the sky, putting the fate of all worlds in danger. And now three women and three men join forces to pick up the pieces Mermaid Annika is from the sea, and it is there she must return after her quest to find the stars. New to this world, her purity and beauty are nothing less than breathtaking, along...

Mermaid kittens and best friends Angel, Shelly, and Coral dive headfirst into working on their art project together, until their fun is nearly ruined when they run into their rivals, a trio of purrmaids called the Catfish Club.

When she incurs Neptune's wrath by finding a diamond ring buried under rocks in the ocean, Emily is put under a curse that will force her to choose to be either a mermaid or a human and split up her parents forever.

Fairy realm, bk.3. When her home is threatened by fire, Jessie returns to the magical world of the Realm and visits the mermaids of the Under-Sea to search for a wish-stone.

Sweet, awkward sixteen-year-old Ruby Gillman is desperate to fit in at Oceanside High, but she mostly just feels invisible. She's math-tutoring her skater-boy crush, who only seems to admire her for her fractals, and she's prevented from hanging out with the cool kids at the beach because her over-protective supermom, has forbade Ruby from ever getting in the water. But when she breaks her mom's #1 rule, Ruby will discover that she is a direct descendant...