The Holothuroidea are a class of the phylum Echinodermata (see echinoderm) which includes the sea cucumbers. They are cylindrical or sausage-shaped with a thick leathery skin. The calcite plates of the skeleton are separated and modified as rods, hooks, anchors, and wheels.
Related category• ZOOLOGY
Home • About • Copyright © The Worlds of David Darling • Encyclopedia of Alternative Energy • Contact