In this book, the authors present current research in the study of the types, characteristics and ecology of zooplankton and phytoplankton. Topics discussed include the bioaccumulation of cyanobacterial toxins in aquatic organisms and their public health consequences; the use of microalgae for aquaculture; the annual cycle of plankton biomass in the Gulf of Mexico; grazer-periphyton interactions; spatial and temporal distribution patterns of zooplankton in a shallow lowland coastal lake and phytoplankton composition in fish farms..