Echinodermata

• 1. Calcareous endoskeleton made up of separate plates or ossicles
• 2. Pentaradial symmetry
• 3. Deuterostomous development
• 4. fully developed or complete gut
• 5. Nervous system is decentralized
• 6. Marine
• 7. Either indirect or direct development
• 8. Contains a water vascular system ("tube feet")