The widely distributed American Lobster, Homarus americanus, which inhabits coastal waters from Canada to the Carolinas, is an important keystone species. A valuable source of income, its abundance or rarity often reflects the health of ecosystems occupied by these crustaceans. This comprehensive reference brings together all that is known of these fascinating animals. It will appeal to biologists, zoologists, aquaculturalists, fishery biologists, and researchers working with other lobster species, as well as neurobiologists looking for more information on the model system they so often use.