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.

When twelve-year-old Boomerang Broom discovers a wish-granting baby mermaid, he takes her home and his little sister begs to keep her, with unexpected consequences.

Longing for onstage stardom, Pearl auditions for the third-grade play and gets the part of the evil sea witch while her best friend is cast in the lead, a situation that challenges their friendship.

A little sea princess, longing to be human, trades her mermaid's tail for legs, hoping to win the love of a prince and earn an immortal soul for herself.

"Two merpups named Lilly and Fin must escape from the clutches of the humans who want to add them to their collection of rare aquatic creatures"--

Itty must figure out why the mermaids of Lollyland have stopped singing.

Mermaid Bay's annual carnival is here, and the best performance at the parade will win a pretty pearl necklace! For the mermaids' act, Rosa plans to perform amazing tricks on the back of a magical water pony. But the pony is stolen! Is someone trying to ruin the friends' chance of winning?

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.

"When Oliver's explorer parents go missing, he sets sail on the rescue mission with some new, unexpected friends"--

Lucas and Clara are floating on a raft when a wave casts them into the sea, where Lucas catches a glimpse of a coral kindom and a dark-haired mermaid helps him, but when his father, King Caleb, hears of this, he scolds Lucas and tells him he has broken an age-old pact.