which of the following is a characteristic of cnidarians
cnidarians, such as jelly fish, sea anemones, hydra, and corals, have tentacles surrounding their mouth. they are a hollow-bodied animal with two celled layers that are organ â¦ ized into tissues. the inner layer forms a digestive cavity where food is broken down. All Cnidarians are aquatic and carnivorous, and they occur in two basic body shapes: polyps,â¦. 2  Characteristics of Cnidaria Cnidaria is an alternative name for the invertebrate phylum Coelenterata, giving emphasis to the stinging structures as characteristic of the phylum.