Which group does not contain polyp?

Explanation

Calcarea is a group that does not contain polyps. Calcarea is a subclass of the phylum Porifera, which includes sponges. Sponges are not part of the Cnidaria, the phylum that includes anthozoans, hydrozoans, and scyphozoans, which all have polyp and/or medusa body forms. Anthozoans, for example, are a class of Cnidarians that include corals and sea anemones, which have a polyp body form. Hydrozoans and scyphozoans have both polyp and medusa body forms at different stages of their life cycles.