Spotted in Friday Harbor, WA. Is this a decorator crab?

Spotted this creature while I was walking the docks in Friday Harbor, WA. There were many shrimp crawling along the pier posts, but these two stood out as a different species. I tried posting a pretty terrible screen grab on iNaturalist and it came back with an ID of decorator crab. This looks a bit different to me comparing to other photos of that species, so thought I would post my not great video here and see if anyone knew who they were. Thanks for looking!