Detailed Instructions: In this task you will be given a text passage from a trivia quiz. You should choose the category this question belongs to from these categories: History, Science, Social Science, Fine Arts, Literature. You can only choose one category, so if in doubt, please choose the closest match.
Q: One sub-clade of this phylum is genus buddenbrokia, which belongs to actinospore-stage-having class myxosporea. A now-extinct group in this phylum named its fossils' wrinkled bodies is rugosa. This phylum's class cubozoa contains the toxic organisms of genus chironex. This phylum's layered bodies consist of epidermis, mesoglea, and gastrodermis, making them the simplest multi-tissue organisms. Members of this phylum's class (*) scyphozoa exemplify two characteristics of this phylum: a two-stage lifecycle, consisting of an often-sessile polyp and a free adult, or medusa and the use of toxic nematocysts. FTP, name this phylum of radially symmetric organisms like sea anemones, corals and jellyfish.
A:
Science