"The Princess in Black and her friends are enjoying a day of sun and sea on Princess Sneezewort's royal boat when a real, live mermaid princess emerges from the waves! Eeeeeee! Princess Posy needs their help protecting her very cute sea goats from being eaten by a very greedy kraken. But the princesses and the Goat Avenger quickly realize that fighting underwater can be tough for land dwellers, and only the mermaid Princess Posy can save the day....

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.

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.

Reunited with her merman father and now living on an island located in the Bermuda Triangle, twelve-year-old Emily accidentally awakens the fearsome kraken and also faces a bully from her past.

Mermaid princess Meeshell knows that someday she will leave her sea kingdom and live on land with her prince, but a change in the tides leads her to attend Ever After High, where she wonders if she will be able to fit in.

"A curious and inventive mermaid attempts to befriend a shark with sensory issues"-- 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.

"Astrid struggles with a shameful secret, Ling discovers courage in a prison camp, and Serafina lines up allies to help fight the final battle for her underwater realm"--

Twelve-year-old Kela is still mourning her mother when she finds a mermaid's comb while she and her friend are looking for sea glass on her Caribbean island; such combs have magic in them, and touching it opens a connection to the mermaid Ophidia who can grant her wish, to bring her mother back to life--but all wishes have consequences, and magic demands a price which may prove to be more painful than the loss of her mother.

"Astrid must confront her ancestor, Orfeo, the evil force behind the rise of the monster Abbadon, while Sera and her Black Fins train goblin troops for battle against her uncle Vallerio's death riders"--

The fairies in Never Land think that mermaids are nothing but trouble. So when Gabby befriends a mermaid, Kate, Mia, and Lainey warn her to stay away. But Gabby doesn’t want to lose her new friend! Tinker Bell and the Disney Fairies star in a magical early chapter book series for readers ages 6 to 9—Disney The Never Girls!