These dipoblastic organisms have an ectoderm and a gastroderm separated by mesoglea or mesenchyme. They have a gastrovascular cavity and possess radial symmetry. The three main classes of this animal are anthozoa, scyphozoan, and hydrozoa. One of its characteristic features is the nematocyst, which 
These dipoblastic organisms have an ectoderm and a gastroderm separated by mesoglea or mesenchyme. They have a gastrovascular cavity and possess radial symmetry. The three main classes of this animal are anthozoa, scyphozoan, and hydrozoa. One of its characteristic features is the nematocyst, which is a structure used for stinging and adhering to prey. For ten points, name this phylum containing corals, sea anemones, and jellyfish.
These dipoblastic organisms have an ectoderm and a gastroderm separated by mesoglea or mesenchyme.
{Cnidaria}