Methods of Hydrobiology discusses the study of life of organism in water. It also discusses the science of inland waters, called limnology. The focuses of learning are animals, plants, and bacteria that live in water. The main object of the book is to review and evaluate the methods utilised to gather data on the characteristics of water dwellers. The topics of bacteriology are also covered. The fields of bacteriology that will be covered are hydrobacteriology, hydrobotany, and hydrozoology. The means of measurement and calculation applied by production biology are discussed. The text begins with a discussion of the types of water and their description. This is followed by a qualitative analysis of the phytoplankton. A separate chapter is devoted to the means for running water investigation. Another section of the book focuses on the procedures in the biological evaluation of underground water. The book will provide useful information to marine biologist, botanist, zoologist, microbiologist, students, and researches in the field of biological sciences.