Are cnidarains tripoblast

No, cnidarians are not triploblastic; they are classified as diploblastic organisms. They have two germ layers: the outer ectoderm and the inner endoderm, with a gelatinous substance called mesoglea in between. This is in contrast to triploblastic organisms, which possess a third germ layer, the mesoderm. Examples of cnidarians include jellyfish, corals, and sea anemones.