How do cnidaria egest?

Cnidaria is a Phylum of invertebrate aquatic animals, which includes jellyfishes, corals and other polyps.

A coelom is defined as a body cavity or area around the gut, so therefore no. Cnidaria such as jellyfish, hydra, coral, and sea anemones do not have a coelom or body cavity

Cnidarians are carnivorous and catch fish by stunning them with their tentacles. They supplement their diet with symbiotic single celled algae that they keep in their tentacles and bodies

No