I'd say your crab is Pugettia gracilis, the Graceful Kelp Crab. It's found in kelpy areas, and it's a bit of a decorator crab, often attaching kelp to itself.
Your anemone-looking thing is an Orange Sea Cucumber (yeah, the long body is tucked away among the rocks hidden out of view). Cucumeria miniata.
Looks like you had a blast today!