Sea Stars Of The Pacific North West

Class Asteroidea
Order Velatida
Family Pterasteridae

WRINKLED STAR

Pteraster militaris

Identification:
5 (rarely 6*) 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.

Range:
Circumboreal. In the north Pacific, from the Bering Sea to northern Oregon; 10 to 1100 m (33 to 3,609 ft).
Notes:
Prey include CLOUD SPONGES Aphrocallistes vastus*, WHITE RETICULATED SPONGE Iophon chelifer var. californiana* as well as the HYDROCORALS Stylaster norvigicus and Stylantheca spp.*.
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.