Contains

• sea urchin

  Shallow-water echinoderms having soft bodies enclosed in thin spiny globular shells.

• crinoid

  Primitive echinoderms having five or more feathery arms radiating from a central disk.

• sea cucumber

  Echinoderm having a flexible sausage-shaped body, tentacles surrounding the mouth and...

• basket star

  Any starfish-like animal of the genera Euryale or Astrophyton or Gorgonocephalus having...

• water vascular system

  System of fluid-filled tubes used by echinoderms in locomotion and feeding...

• ambulacrum

  One of the five areas on the undersurface of an echinoderm on which the tube feet are...

• starfish

  Echinoderms characterized by five arms extending from a central disk.

• tube foot

  Tentacular tubular process of most echinoderms (starfish and sea urchins and holothurians)...

• brittle star

  An animal resembling a starfish with fragile whiplike arms radiating from a small central...