A selection of papers, reports and posters presented at the third European conference on echinoderms - a thorny-skinned group of marine animals considered of great zoological interest. The contributions look at morphology, development biology, ecology and symbiosis.A selection of papers, reports and posters presented at the third European conference on echinoderms - a thorny-skinned group of marine animals considered of great zoological interest. The contributions look at morphology, development biology, ecology and symbiosis.