Nope! It crawled right up onto the limpet.
The spider kept going, moving towards the crevice.
And then this happened:
A juvenile Striped Shore Crab (Pachygrapsus crassipes) emerged from the crevice and moved towards the spider. The crab appeared to be defending its space.
What do you think happened?
The spider retreated and crawled further up the rock wall.
I don't think I had ever considered a standoff between a jumping spider and an intertidal crab. In retrospect, since there is overlap in the habitat they utilize, I supposed it shouldn't have been a surprise. But it sure was fun to see it today!