Mermaid kittens and best friends Angel, Shelly, and Coral dive headfirst into working on their art project together, until their fun is nearly ruined when they run into their rivals, a trio of purrmaids called the Catfish Club.

Purrmaid Shelly is taking care of sea horse and new class pet, Bubbles, who looks mysteriously unwell; luckily Shelly and her two best friends discover how to perk Bubbles up, and in the process learn why some animals are not meant to be pets.--Provided by Publisher.

Purrmaids Coral, Shelly, and Angel help clean up the ocean as a school project and rescue the brother of their mermicorn friend, Sirena, who is trapped by plastic soda rings.

As a school project, best friends and purrmaids Angel, Coral, and Shelly set out in search of a mermicorn.

Coral wants to see her jelly-o-lantern on display, but is nervous about going inside the Haunted House until her friends help Coral overcome her fear.

Shelly is hosting new student Leeza, a grrmaid, at her house, but becomes jealous when Leeza seems more interested in being friends with Coral and Angel.

Shelly, Coral, and Angel visit Flamingo Island with Shelly's mom, but Shelly must put things right when the rock she took as a keepsake ends up being a flamingo egg.