Sunflower seastar (Pycnopodia helianthoides)

Опис:

I'm 98% certain of the species ID but have not had it confirmed by an expert. There are 180 species of Echinoderms in the Pacific Northwest, but this one seems pretty unique in the descriptions (largest seastar in the PNW; 16-24 arms -- this specimen appears to have 16), and matches the pictures of it online.