I sent the picture off to the sea star scientists that we've been working with and they all (independently and without any prompting - i just referred to it as something I hadn't seen at the site before) came back with the id of Leptasterias. Apparently there are some green ones in addition to the pink/white ones as Jan photographed in our waters (3 or so different Leptasterias). They asked for a couple tube feet to barcode it. In person and on the video the ray shapes are really different than all the evastarias and brevispinus that are in the area, flatter and broader nearing the disk, more triangular if you will.
Visual identification aside, IF the stars (it and the other one that is identical to it that was found at another Alki site) actually happen to be Leptasterias of some form (and I understand you may feel it to be a bit IF), do either of you have any historical data on them in the mid sound?
"I survived the Brittandrea Dorikulla, where's my T-shirt!"