What is the common name of $Fungia$?

Which of the following is the larva of Cnidaria?

In animals belonging to the phylum $Coelenterata$ $(Cnidaria)$, cells performing similar functions aggregate to form which level of organization?

Which of the following organisms exhibits diploblastic organization?

In coelenterates,the characteristic larva is

The cells absent in the gastrodermis of $Hydra$ are