Starfish, Urchin and Sea Cucumber (Echinoderms)

Echinoderm meaning spiny skin is a feature shared by most species in this group, another character they all have is the radial symmetry, meaning the body can be divided into five similar parts around a central axis, more commonly known as starfish, sea urchins and sea cucumbers.

Over 6,000 echinoderm species have a water vascular system [...]