• Kingdom: Animalia
  • Phylum: Echinodermata
  • Subphylum: Asterozoa
  • Class: Asteroidea
  • Order: Velatida
  • Family: Pterasteridae
  • Scientific name: Pteraster militaris
  • Norwegian: -

Characteristics:

Typical for the Pterasteridae family members are the spined papillae on the dorsal side. A soft skin is covering the spines, giving the surface of these sea stars a untidy, bumpy appearance. There are usually three or four spines on each papillae, sometimes two or five.

P. militaris is bigger than the similar Pteraster pulvillus, the diameter may reach 85 mm. The color of P. militaris is white, pale yellow or orange. It has five, sometimes red-tipped, arms. A third species in this family, P. obscurus has 6-8 arms.

Habitat:

It seems most frequent on rocky substrate, deeper than 25 meters.

Distribution:

This is a circumpolar species, found in the Arctic as well as the northern parts of the Pacific and Atlantic Ocean, as far south as the North Sea and New Foundland.