Full-color photos. "Arthur showcases varieties of shelled mollusks, echinoderms, crustaceans, turtles, tortoises, and terrapins, illustrating how shells and pearls form and comparing species that inhabit such different environments as freshwater bodies and coral reefs. Stunning close-up photos and detailed captions will attract browsers and researchers looking for information on this popular subject."--(starred) Booklist.  
--This text refers to an out of print or unavailable edition of this title.
