Can you see the crab in the photo?
Too easy? In the comfort of your home, perhaps. While swimming about and trying to pay attention to everything, it can be surprising what a person may miss. Here, I was happy to spot the crab right away, for down in Monterey I'd started to pick up a decorator crab thinking that it was a piece of trash; I dropped it before it could pinch my fingers. This creature is fairly well camouflaged, but not so decorated as that other one.
Here's the close-up.