The book is of great importance owing to the high amount of fish processing wastewater being discharged, very high value of live feeds for aquaculture especially in hatcheries and to harness the utility of fish processing organic waste and its ample availability, this book highlights the efficiency of the fish processing wastewater and its applications as an alternative culture medium for live feed (phytoplankton as well as zooplankton) that can be served to the fish hatcheries.