Yes they are.
There is none. Corals are cnidarians.
Jellyfish, corals, and box jellies are cnidarians.
Corals and Jellyfish are cnidarians, sponges are not.
Cnidarians
Cnidarians
No, coral is an animal.
they belong to cnidarians
The three major classes of cnidarians are hydrozoans, jellyfish, and sea anemones and corals.
Jellyfish, corals, and box jellies
They are Cnidarians or coelenterates .
No, cnidarians are not protists. Cnidarians are a diverse group of animals that include jellyfish, corals, and sea anemones. Protists are a separate group of eukaryotic organisms that are not classified as animals.
Flatworms don't belong to cnidarians .They belong to Platyhelminthis . All others are cnidarians .