article: Cnidaria
links: Hydrozoa Box jelly Ctenophore Portuguese man o' war Animal Anthozoa Medusa (biology) Cnidocyte Symmetry (biology) Scleractinia Staurozoa Cubozoa Scyphozoa Sponge (animal) Hydra (animal) Myxozoa Jellyfish Ediacaran biota Radiata Greek language