Monday, February 17, 2014

The week in wildlife

Week in Wildlife: The Granulated sea star at Madrid ZooA granulated sea star (Choriaster granulatus) at Madrid zoo and aquarium, Spain. The granulated sea star is a species of starfish. It is the only species in the genus Choriaster, feeds on algae and detritus and occurs on rubble slopes and on coral reefs. It lacks a centralised brain but has a complex nervous system with a nerve ring around the mouth and a radial nerve running along the ambulacral region of each arm parallel to the radial canal