Precise descriptions and labeled illustrations of hundreds of the most commonly encountered species provide readers with the best source available for identifying zooplankton.Inside the second edition- an updated introduction that orients readers to the diversity, habitats, environmental responses, collection, history, and ecological roles of zooplankton- descriptions of life cycles- illustrations (including 88 new drawings) that identify 340-plus taxa and life stages- range, habits, and ecology for each entry located directly opposite the illustration- appendices with information on collection and observation techniques and citations of more than 1, 300 scientific articles and books