Members of this phylum come in two forms, the sessile polyp and the swimming medusa.
One member of this phylum is model organism N. vectensis, used to study the bilaterally symmetric body plan. Recent inquiry into the musculature of this phylum has led Seipel and Schmid to classify them as triploblastic, though they are most commonly thought to have two epithelial layers with mesoglea in between. One characteristic feature of this phylum contains structures like a "finger" and a cilium that acts as a trigger; a barbed cell known as a nematocyst used to deliver toxins. Members of this phylum come in two forms, the sessile polyp and the swimming medusa. For 10 points, name this phylum that contains anemones, corals, and jellyfish.
One member of this phylum is model organism N. vectensis, used to study the bilaterally symmetric body plan.
{cnideria} [or {cnidarians}]