The crustacean zooplankton of Chilean inland waters has been studied mainly in large Patagonian lakes, while that plankton in other Chilean water bodies has as yet been insufficiently investigated. The species actually reported upon herein require revision as regards their taxonomy and biogeography. On the basis of studies in the Patagonian lakes, oligotrophy has been determined as the main factor regulating zooplankton assemblages, whereas in southern shallow ponds the main regulating factors are oligotrophy and conductivity combined. No detailed studies for other Chilean water bodies are available to date. This book provides a checklist with updated information of the species of crustacean zooplankton in Chilean inland waters, while the results of an ecological study offer data for understanding the distribution and abundance of those faunal elements in the area.