This Pagurus granosimanus (Grainyhand aka Grainy Hermit) was very active. Its dogwinkle shell was about 1.3" long.
Found at low tide, seems way too big for the shell it's using.
Another lively Petrolisthes eriomerus (Flattop Crab), a porcelain crab, identified with its blue marks between its pincers.
This 1" wide Pachycheles rudis (Thickclaw Porcelain Crab) had quite the attitude!
From past files .
to the victor goes the new shell, in this case, the loser appeared to get killed.
I've seen sea otters look absolutely terrified the entire time they are eating one of these. I get it. Sand crab on steroids.
This crab lives commensally with sea anemones, and is a filter feeder.
In the second photo here, the squat lobster is shown with its meal. After I took the first photo, it quickly dashed out and grabbed something (larva? baby fish?) and quickly went back into its hole. There's also a nudibranch in the second shot, Phyllidiopsis annae.
The shell it's occupying was a Legrand's spindle (Fusinus undatus).