"Following a tragedy that further alters the course of her life, twelve-year-old Lucy Everhart decides to continue the shark research her marine biologist mother left unfinished when she died years earlier"--

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.

The world's shark population is in trouble for a sad, simple reason: shark fin soup. And although it's illegal, poachers have been targeting Florida's biannual migration of blacktip sharks. Marine biologist Doc Ford needs some assistance protecting the sharks and enlists the help of three kids, Luke, Marta, and Sabina. Together they form Sharks, Inc. and are given an important assignment: to set out each day on their small fishing boat in hopes of...

"Gray and his alliance of peaceful shivers--Riptide, Coral, and AuzyAuzy--have beaten the bloodthirsty emperor Finnivus and his vicious Indi Shiver armada to smithereens, sending them swimming as fast as they can retreat. But there's no time to party. Finnivus may have been humiliated, but he's still out for revenge. This is the ruler who feasts on the heads of every shark he conquers, after all"--P. [4] of cover.

Everywhere Gray and Barkley swim, fish are whispering of a growing threat, of a shark named Finnivus who will eat anything or anyone, and won't stop until he has seized control of the entire ocean. Finnivus has an armada of vicious battle sharks to help him expand his empire, and Gray realizes that it's up to him to save the Big Blue. But first he must train with Takiza, the wise and mysterious fighting fish who has promised to teach his young apprentice...

"Clark the Shark learns about sharing with a little help from his friends"--