Phylogeny of Echinoidea / Sea Urchin Life History Strategies / Gametogenesis in Regular Sea Urchins -- Structural, Functional and Molecular/Genomic Biology / Biochemical and Energy Requirements of Gonad Development in Regular Sea Urchins / Endocrine Regulation of Regular Echinoid Reproduction / Larval Ecology of Echinoids / Growth and Survival of Postsettlement Sea Urchins / Digestive System of Regular Sea Urchins / Ingestion, Digestion and Digestibility of Regular / Nutrition / Carotenoids / Disease: Effects from Individuals to Ecosystems / Immunology in Sea Urchins / Deep-Sea Sea Urchins / Regular Sea Urchins as Drivers of Shallow Benthic Marine Community Structure / Effect of climate change on sea urchins / Stock Enhancement of Regular Sea Urchins / Clyypeasteroidea / Peronella / Echinocardium cordatum / Cidaroida / Centrostephanus rodgersii and Centrostephanus tenusipinus / Diadema / Arbacia / Loxechinus albus / Paracentrotus lividus / Psammechinus miliaris / Echinometra / Evechinus chhloroticus / Heliocidaris erythrogramma / Strongylocentrotus droebachiensis / Strongylocentrotus pururatus and Mesothuria franciscanus / Strongylocentrotus intermedius / Mesocentrotus nudus / Hemicentrotuos pulcherimus, Pesudocentrotus depressus, and Heliocidais crassispina / Lytechinus / Tripneustes