The Octonauts are a crew of eight talented adventurers who love to explore the great big ocean. One day, Tunip wonders where he and the rest of the Vegimals originally came from. The Octonauts set off on an exciting mission to search all the wonderful and unusual underwater habitats. Will Tunip ever find somewhere truly special to call "home"?

When the Octonauts, a team of eight animals who explore the ocean, discover a bleached and abandoned coral reef, they learn about the important relationships among animals, plants, and their habitats.

Saltwater crocodile: A giant saltwater crocodile wanders into freezing waters so the Octonauts try to return the predator to its warm water home -- Decorator crab: When important objects go missing from their ship, the Octonauts stake out the thief who turns out to be a decorator crab, stealing their things to decorate his shell -- Giant spider crab: Kwazii is frightened when he spots a giant underwater spider, but it turns out to be a very old spider...