In a future of high technology and genetic modification the Coral Kampii, like legendary mermaids, live isolated from the Above World, but when the devices that allows them to breathe underwater start to fail, thirteen-year-old Aluna and her friend Hoku go to that forbidden place to find help.

Neptune, King of the ocean, sends half-mermaids Emily and Aaron to the land of the midnight sun to investigate the source of the dangerous storms brewing in the ocean.

A class trip to a beautiful island is overshadowed by a local myth about a mysterious ship that may have ties to the lost city of Atlantis.

At the beach, Pinkalicious and her brother help a tiny mermaid, a merminnie, to go back home.

Emily is headed to a tropical island for a relaxing vacation with friends and family. And this time, Emily promises her best friend, Shona, there will be absolutely no adventure just plenty of fun. But somehow excitement always seems to find Emily, and before she knows it, she ends up on the other side of a powerful waterfall on a forgotten island no one else can get to.

When Emily makes a wish on a magic stone, she gets a glimpse of what the future holds--and it's a disaster! She tries to make things right, but each trip through time takes Emily to a future where things turn out badly for either the humans of Brightport or the merpeople of Shiprock. Plastic pollutes the ocean, garbage overflows the landfills, and the two towns are no longer getting along. Emily realizes she can't save her hometown and the ocean alone,...

Barbie has an adventure as a mermaid.

"Before Prince Eric's mother, the Queen of Vellona, went missing two years ago, she reminded him about the details of the deadly curse that has plagued his entire life. The curse? If he were to kiss someone other than his true love, he would die. With a neighboring kingdom looking for any excuse to invade their shores, and rumors of ghost pirates lurking the seas, Eric is desperate for any information that may help him break his enchantment and bring...

"Set in the ocean off Japan, this retelling of Goldilocks and the Three Bears stars Kiniro, a mermaid, who finds a baby octopus's breakfast, chair, and bed just right"--