Obelia · A hydroid

Obelia belongs to phylum Coelenterata (cnidaria).

KingdomAnimaliaPhylumCoelenterata

Worth remembering: Shows metagenesis: polyps make medusae and medusae make polyps.

Classification of Obelia

KingdomAnimalia
PhylumCoelenterataCnidaria
Common nameA hydroid
NCERTClass 11 Biology, Chapter 4: Animal Kingdom

Why it's in Coelenterata

Coelenterata: Stinging cells (cnidoblasts) on the tentacles; a central gastro-vascular cavity; two body forms, polyp and medusa.

Other NCERT examples of Coelenterata

PhysaliaPortuguese man-of-warCoelenterata
AdamsiaSea anemoneCoelenterata
PennatulaSea penCoelenterata
GorgoniaSea fanCoelenterata
MeandrinaBrain coralCoelenterata
AureliaJellyfishCoelenterataA medusa form.
HydraHydraCoelenterataA freshwater polyp.

All about Coelenterata →

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