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.

On the night of the blue moon when mermaids are said to gather on a sandbar in the Gulf of Mexico, ten-year-old Keeper sets out in a small boat, with her dog BD and a seagull named Captain, determined to find her mother, a mermaid, as Keeper has always believed, who left long ago to return to the sea.

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?

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.

In this picture book retelling of Disney's live action The Little Mermaid, Ariel longs to learn more about the human world and makes a deal with the Sea Witch, Ursula, to make her dream come true, but with disastrous consequences.

The purrmaids are going on their very first school sleepover, but Angel feels left out when she is paired with Cascade, a member of the Catfish Club.

"While riding the subway home from the pool with his abuela one day, Julián notices three women spectacularly dressed up. Their hair billows in brilliant hues, their dresses end in fishtails, and their joy fills the train car. When Julián gets home, daydreaming of the magic he's seen, all he can think about is dressing up just like the ladies in his own fabulous mermaid costume: a butter-yellow curtain for his tail, the fronds of a potted fern for...

A disagreement between Coral, Filly, and Manta, three young mermaids who work together to build and safeguard the reef that is their home, must quickly be set right.

"Traveling home by cruise ship should be a relaxing break after Emily's latest adventure, but things take a turn when the ship is overtaken by a pirate king and his crew. After the pirates collect everyone's riches, they steal something even more valuable: Aaron. The pirate king's eldest son takes Aaron captive, forcing him to help guide the pirates to the mythical Trident's Treasure. So Emily dives into action and joins the younger son's crew in...

As they continue their quest to find the Snow Diamonds, Katie and her mermaid friends seek help from the Chief Walrus, but first they must save his young grandson, who sneaked away to play with his best friend, a polar bear.