Octonauts: 12 Rescue Missions (DVD)

Mariana Trench Adventure Tweak has designed a brand-new Deep Sea Station to study the deepest, darkest reaches of the ocean, but the Octonauts face multiple challenges: from getting it down there, to the extreme environment and strange, prehistoric creatures that greet them once they arrive. Barracudas Shellington and the Vegimals mission to replant a mangrove forest is put in peril by a school of toothy barracudas. Artificial Reef When an underwater storm destroys a small reef, which a frogfish and other creatures depend on, Tweak and her crewmates must convert the Gup-F into an artificial reef before another storm strikes!