Brightly coloured and large the common sunstar is a serious predator which feeds on a variety of invertebrates including other sea stars. The individual in this image was living on the rusting metal plates of a trawler wreck and this may have contributed to its unusual colour, the majority of common sunstars come in variations of red rather than orange. The number of arms may vary between 8 and 14. To 340 mm. N Atlantic from the Brittany to the Arctic, Iceland, Greenland, Canada.