These are typically invertebrate animals, which show a very simple level tissue organisation. They are aquatic animals and are mostly found in marine environments, attached to the rocks at the bottom of the ocean.
Characteristic Features of Phylum Coelenterata:
They are multicellular organisms.
They are diploblastic.
They show radial symmetry.
They have a single opening in the body.
Digestion takes place in the body cavity which is the coelenteron.
They can live in marine or freshwater habitats.
They can be solitary or live in colonies.
These organisms show two morphological forms – Polyps and Medusa.
They are carnivorous in nature with a few exceptions such as the s corals. They get their food from other animals that live symbiotically within them.
Digestion is both intracellular and extracellular