Classes Under Phylum Cnidaria

Front 1

Hydrozoa

Back 1

Solitary or colonial, asexual polyps and sexual medusae, although one type may be suppresed, hydranth with no mesentries, medusae (when present) with a velum, both fresh water and marine

Front 2

Scyphozoa

Back 2

Solitary, polyo stage reduced or absent, bell shaped medusae without velum, gelstinous mesoglea much enlarged, margin of bell or umbrella typically with eight notch that are provided with sense organs of all marine

Front 3

Staurozoa

Back 3

Solitary, polyps only, medusa absent, polyp surface extended into eight clusters of tentacles surroundingbmouth, attachment via adhesive disc, all marine

Front 4

Cubozoa

Back 4

Solitary, polyo stage reduced, bell shaoed medusae square in cross sectiin, with tentacle or grouo of tentacles hangung frim a bladeluke pedaliuk at each corner of the umbrella, margun of umbrella entire, without velum but with velarium, all marine

Front 5

Anthozoa

Back 5

All polyps, no medusae, solitary or colonial, gastrovascular cavity subdivided by at least eight mesentries or septa bearung nematocysts, gonads endodermal, all marine

Front 6

Hydra, Obelia, Physalia, Tubularia

Back 6

Clas hydrozoa

Front 7

Aurelia, Cassiopeia, Rhizostoma

Back 7

Class Schyphoza

Front 8

Haliclystus, Lucernaria

Back 8

Class Staurozoa

Front 9

Tripedalia, Carybdea, Chirones, Chiropsalmus

Back 9

Ckass Cubozoa

Front 10

Corals, sea anemone

Back 10

Class anthozoa