This is a guide to echinoderms of Panboola based on records from the Atlas of Living Australia http://alcw.ala.org.au/bdrs-core/alcw/fieldguide/groups.htm?group=Echinoderms
Synaptidae is a family of sea cucumber that have no tube feet, tentacle ampullae, retractor muscles, respiratory trees, or cuvierian organs. They also lack radial canals of the water-vascular system, with only the circumoral ring present.