主演：Ross Breen,泰莉莎·加拉赫,韦恩·格雷森,西蒙·格林诺,Shelley Longworth,Mary Murphy,Michael Murphy,Paul Panting,Rob Rackstraw,威廉·范德普耶,基思·威克姆,Jo Wyatt

Kwazii and Dashi become entangled in a strange deep-sea creature - a siphonophore - and when a geyser blasts it toward the surface, the Octonauts must stop its ascent before it fatally bursts.