Phylum · Cnidaria · Animalia › Coelenterata · NCERT Chapter 4: Animal Kingdom
Stinging cells (cnidoblasts) on the tentacles; a central gastro-vascular cavity; two body forms, polyp and medusa.
| PhysaliaPortuguese man-of-war | Coelenterata |
| AdamsiaSea anemone | Coelenterata |
| PennatulaSea pen | Coelenterata |
| GorgoniaSea fan | Coelenterata |
| MeandrinaBrain coral | Coelenterata |
| AureliaJellyfish | CoelenterataA medusa form. |
| ObeliaA hydroid | CoelenterataShows metagenesis: polyps make medusae and medusae make polyps. |
| HydraHydra | CoelenterataA freshwater polyp. |