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.
Based on the 1980s comic books by Tadeusz Baranowski, is primarily aimed at children. “But the element of nostalgia is obvious for today's 30- or 40-year-olds, who often are also parents, and I care about this intergenerational, shared experience of the film. I’d like adults to have fun watching it and to feel like children again for a while.”