Contains five stories in which Olly the submarine and his friends learn valuable lessons while staying overnight in a haunted ship, getting caught in the Kelp Forest, and having other adventures.

Celebrates preschoolers' fascinations with dinosaurs and trains. Includes Otto Opthalamousaurus; Shoshana Shonisaurus; Maisie Mosasaurus and a sea turtle tale.

Olly helps Diver Doug care for the ocean floor for the creatures and watercraft that call it home. When they're not on the job, the subs head off for adventure in their underwater wonderland with friends like transport vehicle Skid and Brandt, a hermit crab who wants to be a pirate.

Contains five stories in which Olly the submarine and his friends learn lessons about life, such as the importance of keeping a secret and how to be considerate.

Cookiecutter sharks: Captain Barnacles and the crew investigate why mysterious holes have started to appear in their equipment -- Lost lemon shark: The underwater explorers go in search of a lemon shark that has hurt its nose and is struggling to find its way home -- Dwarf lantern shark: Captain Barnacles and the team try to find an injured dwarf lantern shark -- Giant jelly: The crew tries to rescue Peso when he becomes trapped inside a giant jelly...

Quick, it's a runaway Octopod! Captain Barnacles and crew must catch a runaway Octopod when it's hijacked by a group of crustaceans trying to escape their algae infested waters! Embark on a treasure hunt with Kwazii as he tries to find treasure in a sunken pirate ship until the slime-squirting Slime Eels find him! And venture out to the Mariana Trench to try and stop a herd of sea pigs before they march into the deepest point on earth!

Great penguin race: The Octonauts cheer Peso on as he goes home to compete against an awesomely athletic penguin -- Great Arctic adventures: Peso goes with Barnacles to help his sister and her new polar cubs learn to navigate the harsh conditions of the frozen arctic -- Humpback whale: A humpback whale helps Kwazii track down a treasure chest key.

The Reeftown Rangers set off on a migratory adventure from the Antarctic to the Arctic. They encounter narwhals, penguins, and humpbacks on the way.

Meet Zooli, the new guppy in town! She's a super smart animal expert who isn't afraid to save the day. She joins Molly, Gil, and the rest of the Bubble Guppies for epic underwater adventures!

Ex-pirate Kwazii, along with Captain Barnacles, medic Peso Penguin and the other Octonauts, embark on several pirate adventures while exploring and protecting marine life and habitats.