COELENTERATA (CNIDARIA)

These are animals living in water. They show more body design differentiation. There is a cavity in the body. The body is made of two layers of cells: one makes up cells on the outside of the body, and the other makes the inner lining of the body. Some of these species live in colonies (corals), while others have a solitary likeā€“span (Hydra).

Jellyfish and sea anemones are common examples

Fig – Colenterates

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