Synopsis The book contains 25 research articles and reviews on different aspects of ecology of polluted waters, both lentic and lotic water bodies, and toxicity of pollutants to fish and other aquatic organisms. Keeping in view the multidisciplinary nature of the subject, diverse areas of research have been covered including environmental impact assessment, river pollution, plankton diversity, impact of pollution on aquatic macrophytes and bank vegetation, heavy metal pollution, toxicity of insecticides, herbicides, fungicides, metals, etc. to fish, tadpoles, prawn and other aquatic organisms. The book shall be of great help to the teachers, researchers, and post graduate students in the field of limnology, ichthyology, environmental science, botany, zoology, environmental chemistry and toxicology as a reference book.