Pteraster militaris, (O.F. Müller, 1776)
Pteraster militaris, the wrinkled star, is a species of starfish in the family Pterasteridae. It is found in the northern Pacific Ocean, the Arctic Ocean, the Barents Sea, and the northern Atlantic Ocean.
Pteraster militaris is a robust starfish with a wide disc, a large central pore and five short, wrinkled, triangular arms. The aboral (upper) surface is dotted with papulae, each topped with four short spines and above this is a papery covering giving the starfish an inflated, bulky appearance. It grows to a diameter of 85 millimetres (3.3 in) and is usually orange, pale yellow or white, sometimes with red tips to its arms.
Pteraster militaris is found in rocky habitats in water down to a depth of 1,100 metres (3,600 ft) in the Arctic Ocean, the Bering Sea, the north west Pacific Ocean as far south as Oregon, the Barents Sea and the north east and north west Atlantic Ocean.
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