导演：未知

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.