New to Lady Sealia Foam's Mermaid School, Marnie Blue worries about fitting in and doing the right thing when a classmate is in danger.

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.

"In her fourth adventure, everything finally seems to be perfect in Emily Windsnap's life. Her family is together again, and she's free to spend time with her friends. But when the mer-town of Shiprock is threatened by construction, Emily and her family are charged by Neptune to bring humans and merpeople together. Before Emily knows it, she's back in Brightport, carrying out Neptune's orders, searching for missing sirens with Shona, sorting out her...

Monty the Malodorous is a daring pirate. He is brave. He is bold. He is feared by all who sail the six or seven seas. But Monty has a secret: he can't swim. He never goes into the ocean and he never takes a bath. Real pirates don't bathe. "Yar-har-har" he says. But things change when he meets a mermaid named Meg.

Since her mother's death, 12 year old Kela feels as broken as the shards of glass known as "mermaid's tears" that sparkle on the beaches of her Caribbean island home of St. Rita. When Kela and her friend Lissy find an ancient-looking comb, Kela knows that she should leave it alone, but she brings it home with her. In the deep ocean, the mermaid Ophidia can feel that her comb has been taken and must grant a wish in exchange for the comb. Kela wants...

Lumina is a mermaid who dreams of being a princess. As long as she can remember, she₂s had a magical power that makes pearls dance and glow. Lumina, and her best friend Kuda, a pink seahorse, embark on an adventure to a majestic mer-kingdom. There, she uses her powers to help her friends prepare for the Royal Ball. Lumina then discover that her magical pearls are the key to unlocking her true destiny and ultimately saving the kingdom.

As Serafina uncovers more clues about the talismans, Neela ventures into a sea dragon's nest, and Ling learns the identity of their foe.

At Lady Sealia Foam's Mermaid School, Marnie and her classmates participate in an athletic competition, but when the crown, awarded to the winner, goes missing, Marnie swims to the rescue.

As the siren Effluvia tries to melt the Artic ice palace and destroy the sea animal sanctuary, the Sea Keepers and a friendly narwhal search for the magical pearl that will stop Effluvia. Includes tips for being a real-life sea keeper.