Cnidarians are jelly fish it means stinging cell.
Includes hydra, jellyfish and corals
The phrase 'phylum cnidaria' means hydras; polyps; jellyfishes; sea anemones; corals
Cnidaria are diploblastic, only consisting of 2 body layers, no cephalisation and limited nervous system and musculature. Annelida however, is triploblastic (with 3 body layers). Members are also...
There are hundreds if not thousands of species in the phylum Cnidaria.