- Is bright orange to red;
- Is named as such because it’s about the size of a large biscuit;
- The upper surface is covered with many interlocking small plates and six to eight larger plates along the edge of each of their short arms;
- Lives on intertidal rocky shores and in coastal waters to a depth of 40 meters; and
- Feeds on sea squirts, sponges, bryzoans and algae.