Animated deep sea adventure series. Captain Barnacles and his intrepid band of explorers roam the oceans in search of adventure and fun. Whether it's a perilous voyage to the bottom of the sea or the piratey pursuit of a giant squid, the Octonauts leap into action and always prove that eight heads are better than one. A lost Pilot Fish who eats ocean gunk cleans up the Octonauts' dirty Gups - but he's still hungry! Meanwhile, Captain Barnacles must figure out why a Whitetip Shark is chasing the Gup-A.