Phylum Coelenterata (Cnidaria)

Characteristics of Phylum Coelenterata:  

1. They are mostly aquatic organisms. 

2. They are diploblastic organisms i.e. they have two distinct body layers ( ectoderm and endoderm ) separated by a mesogloea .

3. They exhibit tissue level of organization.

4. They are radially symmetrical . 

5. They have only one body cavity called enteron or gut ( gastrovascular cavity ) with only one opening, the mouth, and no anus. The mouth also