When a big blue whale comes to live near their reef, there is a misunderstanding between him and Rainbow Fish and his friends that leaves everyone very unhappy and hungry

In order to find healing algae for the ailing bumpy-backed fish, Rainbow Fish volunteers to brave the dreaded Sea Monsters' Cave

When an underwater current sweeps away his last sparkling scale, Rainbow Fish must brave the deepest waters to find it. What he also finds are the wonders of the deep sea and some amazing new friends.

"When Rainbow Fish meets a new friend, Humbert, he isn't sure what to think. Humbert tells all kinds of strange stories: Somewhere at the bottom of the ocean there's a plug! There's a blue whale living near here . . . and he's going to eat up all of our food. But before Rainbow Fish and his friends panic, they realize that Humbert just likes to make up tall tales. Rainbow Fish and his friends soon come up with an idea that might make them all happy--even...