http://pemsea.org daily 1 2008-08-20T09:33:01Z http://pemsea.org/events/events/ascidian-workshop Ascidians are members of the subphylum Urochordata, a subset of the Phylum Chordata. Chordate features - notochord, nerve cord and post-anal tail - are present only in the larval stage. When the larva, or tadpole settles, it absorbs these parts and metamorphoses into a tail-less, spine-less sessile adult. Ascidians are found all over the world, usually in shallow water with salinities over 2.5%. While members of the Thaliacea and Larvacea swim freely like plankton, sea squirts are sessile animals attached to substratum such as rocks and shells. No publisher webmaster Event 2010-02-16T04:54:56Z Event