When Cora reads a short story she wrote about a narwhal in her English class, Vivian Shimmermore mocks her and says that everyone knows that narwhals are fake. Suddenly Cora and her friends are embarking on an exciting quest to find these not-so-mythical creatures and prove Vivian wrong.

When mermaid Vera and Octo-boy Beaker investigate what seems like a wave of vandalism in Tidal Grove, they discover a baby Mantis shrimp who does not fully understand his own power, and help him find his family.

What if Ariel had never defeated Ursula? It's been five years since the infamous sea witch defeated the little mermaid...and took King Triton's life in the process. Ariel is now the voiceless queen of Atlantica, while Ursula runs Prince Eric's kingdom on land. But when Ariel discovers that her father might still be alive, she finds herself returning to a world--and a prince--she never imagined she would see again.--

While journeying to the mer-kingdom, Lumina, a mermaid with magical powers over pearls, discovers that she is a princess.

"A mermaid and her otter friend go on a journey to help a lost beluga whale return to the Arctic."--

After finally convincing her mother that she should take swimming lessons, twelve-year-old Emily discovers a terrible and wonderful secret about herself that opens up a whole new world.

When Echo injures her tail, she can't compete in the Poseidon Tail Flippers team competition. Will Echo find a way to help her team win from the sidelines?

Uncovering an ancient evil, Serafina, a mermaid of the Mediterranean Sea, searches for five other mermaid heroines who are scattered across the six seas, to save their hidden world.

Shelly can't wait to celebrate her birthday with a small sleepover and her grandfather's homemade pizza. But when Pearl gets involved in panning, the little partby becomes an overnight extravaganza at the People Museum, complete with a scavenger hunt and way-too-scary stories! Shelly is worried about spendig the night in the museum's dark spaces and creeking exhibits. Surprisingly, everything goes swimmingly - until strange, glowing lights mysteriously...

"From New York Times bestselling author Jane Yolen comes a lilting lullaby from the bottom of the sea."--Publisher's description.