Box jellyfish (class Cubozoa) are cnidarian invertebrates distinguished by their cube-shaped medusae. As a cnidarian, this jellyfish has an asexual and sexual reproduction. Their presence implies that the cnidarian and bilaterian lineages had already diverged. GLWamide-immunoreactive neurons display as neurotransmitters in cnidarian organisms. The lion's mane jellyfish ("Cyanea capillata") is the largest cnidarian species, of the class Scyphozoa. Asexual reproduction makes the daughter cnidarian a clone of the adult. Nevertheless, major cnidarian groups contain species that have escaped these limitations. In addition, there exists a cnidarian parasite, "Polypodium hydriforme", which lives inside its host's cells. This is responsible for the stings delivered by a cnidarian. Porpita is also in the phylum Cnidarian. Some species within the cnidarian class Anthozoa are bilaterally symmetric (For example, "Nematostella vectensis"). If a host cnidarian is present, they may feed on the host's mucous. On this basis Grant (1990) classified "Cloudina" as a coral-like cnidarian. Cnidarian sexual reproduction often involves a complex life cycle with both polyp and medusa stages. Cnidarian species are found in one of two body forms&colon; the polyp and the medusae.