Grzhnck's Student Animal Life Resource: Corah, Jelly fishes. Sponges, and Other Simple Animals offers readers comprehensive and easy-to-use information on Earth's simple animals. Phylum entries provide an overview of a group of classes, and class entries provide an overview of a particular class. Entries arc arranged by taxonomy, the science through which living things are classified into related groups. Each entry includes sections on physical characteristics; geographic range; habitat; diet; behavior and reproduction; animals and people; and conservation status. All entries are followed by one or more species accounts with the same information as well as a range map and photo or illustration for each species. Entries conclude with a list of books, periodicals, and Web sites that may be used for further research.