While I'm on the topic of hermit crabs...we came across this big one today, in the shallows toward the end of our last dive of the day:
The crab was eating a mollusc, reaching in from time-to-time to snag-and-snip, then chomp-and-chew.
Despite my curiosity and interest in the crustacean's actions, I couldn't help but feel somewhat sorry for the shell, since it didn't stand a chance against its well-armed aggressor.
Once finished with the meal (we weren't able to stick around to watch until the end), the crab may have moved out of its old shell and into the newly vacated one (how's that for a euphemism?).
As an aside, Mean shot this video clip of me while I was taking the photo: