Crack! Smack! Whack! On a sandy beach, two hermit crabs are fighting over a large, empty snail shell. Why? Both crabs have outgrown their shells and their -homesR are starting to feel rather tight. Discover what happens on -moving dayR as a crab discards its old shell and moves into its latest find. Readers will enjoy learning about the unusual behaviour of these animals, and will love the close-up photos that show hermit crabs in search of their next home.