The Members of Which Clade in the Phylum Cnidaria Occur

Question

The members of which clade in the phylum Cnidaria occur only as polyps?
A) Hydrozoa
B) Scyphozoa
C) Anthozoa
D) Cubozoa

Accepted Answer

Anthozoa is the only clade in the phylum Cnidaria that occur only as polyps. The polyps of Anthozoa can be solitary, like in the case of sea anemones, or colonial like in the case of corals. Hydrozoa, Scyphozoa, and Cubozoa have medusa stages in their life cycle in addition to polyps.