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Echinodermata Classes

The Phylum Echinodermata can be further categorized into classes. Echinoderms have a water vascular system and radial symmetry. Many echinoderms (e.g., five armed starfish) have five-sided symmetry.

Asteroida: Starfish

Ophiuroidea: Brittle Stars

Echinoidea: Sea Urchins, Sand Dollars

Crinoidea: Feather Stars, Sea Lilies

Holothuroidea: Sea Cucumbers