2007 $1 Ocean Series-Biscuit Star Uncirculated Coloured Coin. The Biscuit Star are bright yellow, orange or red plates on the upper surface, separated by white or yellow lines. They feed on a variety of organisms including sea squirts, sponges, bryozoans (lace coral) and algae. Sea stars have no heart or brain. Instead they have a unique vascular system, and system of interconnecting nerves. Please contact Adelaide Exchange Jewellers to find out more on this item.