The hermit crab scampering around Ben T. Davis Beach in Tampa carried an important message. Pinned between my fingers, the critter stretched its body like taffy and peered at the sand, the semi-alert lifeguards and the bikini-clad sunbathers. He couldn’t talk — he’s a crustacean, after all — but his behavior spoke to me: “Don’t get trapped in your shell,” he seemed to say.