Cnidaria, like jellyfish, have two basic body plans. the free-floating jellyfish structure is in form, while the coral is in form.

The free-floating form is the medusa, while the coral is a polyp form.

Answer;

Medusae;polyp

Cnidaria, like jellyfish, have two basic body plans. The free-floating jellyfish structure is in medusae form, while the coral is in polyp form.

Explanation;Cnidarian is a phylum that includes organisms such as jellyfish, sea anemone and coral. They are characterized by a digestive cavity that forms the main body. Cnidarians are radially symmetrical  and also have a nerve net and a single body opening.Cnidarians have two major body shapes or body forms, that is, a polyp form, which is attached to a surface and the medusae form that is an upside-down free-floating form.