Celine joins a marine scientist, Dolly Dolphin and Finny Fish on an incredible journey from the sunlit ocean surface to the mysterious deep seafloor. As the submersible travels through coral reefs, open water, twilight and midnight zones, she discovers ocean currents, bioluminescent animals, hydrothermal vents, food webs and the important role oceans play in supporting life and regulating Earth’s climate. A fascinating learning story that introduces ocean zones, marine ecosystems, deep-sea adaptations, ocean science, environmental connections, and the importance of protecting our oceans.