Phylum Echinodermata

• 7,000 species known• Marine invertebrates• Body Plan

– Bilateral (larvae)– Radial and Pentaradial

• Carnivorous • Body Systems

– Complete Gut– Water vascular system (gas exchange, feeding and

locomotion– Open circulatory system (Haemal system)– Gonads occupy the entire internal cavity

• Sexual reproduction

Class Asterozoa

Class Echinozoa