When the shadows in the ocean go missing, the Octonauts, a team of eight animal underwater explorers, must travel to the Sea of Shade to find them.

When the Octonauts, a team of eight animal underwater explorers, meet a frowning fish, they try their best to make it smile.

"Join global sensations, the Octonauts, in an exciting new title in the classic picture book series that inspired the phenomenally successful animated TV show, broadcast around the world. The Octonauts are a crew of cute animals who love to explore the big blue ocean. From their underwater base, the Octopod, the eight intrepid friends are always ready for fun and excitement! It was a sunny day under the South Pacific Ocean when...ALERT! ALERT! ALERT!...