Purple Sand Dollar, Mellita quinquiesperforata

Despite their fossil-like appearance, these beautiful creatures are alive today.  They are Echinoderms, related to starfish and sea urchins.  The petal-like pattern is basically their gill; it allows them to breathe.  The holes in their body, called lunnules, allow for wave currents to flow past them rather than lifting them up and carrying them away.  A perfect gift for the beachcomber in your life.

Nick recommends size: Small