Pteraster militaris (O. F. Müller, 1776)
5 (rarely 6 or even 7) short, puffy, heavily wrinkled arms and disc with a large central pore. Aboral surface soft to the touch. Pale yellow to pink. To 15 cm (6 in) across.
Arctic circumboreal. In the north Pacific, from the Bering Sea to California; 10 to 1,100 m (33 to 3,609 ft).
A typical WRINKLED STAR. Note the stubby, heavily wrinkled arms and large central pore.
A puffy WRINKLED STAR feeds on a WHITE RETICULATED SPONGE.
This specimen is feeding on ENCRUSTING HYDROCORAL Stylantheca papillosa.
An unusual 6-armed specimen.
A specimen at Skookumchuck Narrows, BC, where they are fairly common.
Another specimen from Skookumchuck Narrows, BC.
3 - 6
Prey include CLOUD SPONGES Aphrocallistes vastus, WHITE RETICULATED SPONGE Iophon lamella as well as the HYDROCORALS Stylaster verrillii and Stylantheca papillosa.
This star has a large dorsal chamber under the aboral skin. Females retain some of their eggs in this chamber and once fertilized, 30 to 40 juveniles grow to about 1 cm (0.4 in) across before exiting through the dorsal pore.