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.
漫画第6巻限定版收录。 含三个小部分： Nostalgia ～那个时候、那个场所～ The changing heart ～真实的感情～ Flower ～萌芽的感情？～
