The temperature and humidity guidelines aren’t merely for crabs’ comfort, Goldfarb clarifies: They “are extremely vital to keeping the crabs alive.” Hermit crabs breathe through modified gills; these ...

It’s a summer tradition in many beach and boardwalk towns: you buy the kids a hermit crab in a brightly painted shell, take it home, and then, usually, it dies. You figure they don’t live very long, ...

This hermit crab has poked its head out of its protective shell to take in its surroundings. Hermit crabs long ago established a tight relationship with the marine snail shells they live in. Since ...