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How many cell layers do cnidarians have?
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cnidarian
A sea anemone from the genus Tealia attached to a rock.
Cnidarians consist of two cell layers: an outer ectoderm and an inner endoderm, also known as the gastrodermis, which lines the coelenteron.1
Between these two layers is the mesoglea, a jellylike material that is largely noncellular.1