Join the Octonauts as they explore the world's oceans, rescue the creatures who live there and protect their habitats above and below the waves. The Octonauts mission to explore Antarctica becomes a desperate rescue as a group of sea stars and urchins are threatened by a brinicle a rare underwater icicle that can freeze creatures on the sea bed. To save the day, the Octonauts use their new vehicle The Gup-S! In other episodes, The Octonauts rescue walrus pups, evacuate creatures living around a reef, and Peso meets a band of insects thought to be extinct.