This book condenses more than three decades’ worth of research and published information about the crab Neohelice granulata. It also serves as a reference book for any researcher studying the biology of crustaceans, and even a reference for other disciplines in which the species serves as a representative model. The study will also be useful to undergraduate and postgraduate students seeking to improve their knowledge of crustacean biology. The topics covered by this second volume include neuroanatomy; visual system; memory and reflexes; anatomy and physiology of the reproductive system; metabolism and digestion; claw muscles; gas and ionic exchange; and endocrine disruption.