They have to be as they can not make their own food as plants ( autotrophs ) can do. So, yes.
Do they have segmented legless bodies? No, so they are not coelenterates. They are insects.
importance of coelenterates
Yes, coelenterates are invertebrates.
harmful effects of coelenterates
A coelenterates habitat is in the ocean and if it is not it lives somewhere
Coelenterates are not cold nor warm blooded
Coelenterates that are found on Cornish shores include the sea anemones, true jellyfish and hydroids.
coelenterates
Comb jellies.
Yes, Yes,
No. Coelenterates are not chordates.
Comb jellies.
coelenterates