Plectaster decanus Muller and Troschel 1843

mosaic sea star, carpet star

Plectaster decanus, mosaic sea star
The Mosaic Seastar or Carpet Star, Plectaster decanus, has five arms. Rows of granules form a network of ridges, clusters purple or red papules fill the spaces in between.
The insert in the main picture shows the detail of the tube feet.
The images below illustrate the colour range of Plectaster decanus.
Plectaster decanus, mosaic sea star patterns
Family =  Echinasteridae
Max size =   arm radius to 12cms
Distribution =  southern Australia, Two Rocks WA to Byron Bay and northern Tas.