Echinodermata Spiny Skinned. Echinoderms *6000 living species 20,000 extinct species *all oceans, all depths *Planktonic larvae - bilateral symmetry *adult.
Phylum Echinodermata. Introduction n Echinodermata are all marine, triploblastic unsegmented coelomates n Phylum has 3 unique features: u pentagonal symmetry.
Animal Diversity 3 Deuterostomes: Echinodermata and Chordata.
