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. Water ...

Sea urchins are one of the ocean's most bizarre creatures. In many species, their rotund bodies are covered in spikes, they exist at all sea depths, and their spines might even help treat bone ...