They include sea daises and sea cucumbers.
Extinct classes in this phylum include the Homolozoa, which grew on stalks and were often asymmetric. An important class of these creatures are the crinoids, the only living taxa within the Pelmatazoa, the sessile class of this phylum. Motile organisms in this phylum are called Eleutherozoa. An important feature of these creatures is also called the ambulacral system. These animals are notable for their (*) tube feet, and they develop from bilateral larva into pentaradial adults. They include sea daises and sea cucumbers. These animals are perhaps most notable for their hydrovascular system. For ten points, name this phylum that includes starfish.
Extinct classes in this phylum include the Homolozoa, which grew on stalks and were often asymmetric.
{Echinoderm}s or {Echinoderm}ata