Example of Coelenterata Class Hydrozoa, Scyphozoa and Anthozoa

Phylum Colenterata has been divided into three classes: Hydrozoa, Scyphozoa and Anthozoa.

Only polyps (Hydra) or both asexual polyps and sexual medusae present (Obelia).

Class Hydrozoa:
Examples of Hydrozoa

• Hydra
• Obelia (Sea fur)
• Physalia (Portuguese man of war)
• Velella (Sail by wind)

Class Scyphozoa: Medusoid stage dominant. Polypoid stage reduced or absent.

Example of Scyphozoa

• Aurelia (Jelly fish)
• Periphylla
• Rhizostoma

Class Anthozoa (Actinozoa): Only polypoid stage. Medusoid stage absent.
Examples of Anthozoa:

• Gorgonia (Sea fan)
• Metridium (Sea anemone)
• Alcyonium (Dead man’s finger)
• Fungia (Mushroom coral)
• Pennatula (Sea pen or Sea feather)
• Corallium (Red coral)
• Astraea (Star coral)
• Madrepora (Stag horn coral)
• Tabipora (Organ pipe coral)
• Meandrina (Brain coral)