This volume is the compilation of thirteen research and review articles contributed by senior faculty members of Indian universities and scientific institutions. With its application oriented and interdisciplinary approach, we hope that the students, teachers, researchers, scientists, policy makers and environmental lawyers will find this volume much more useful. Contents- Zooplankton Diversity in Hingni (Pangon) Reservoir of Solapur District, Maharashtra; Ichthyofauna of Ukkadam Wetland Ecosystem, Coimbatore District, Tamil Nadu, Southern India; On the Stranding of the Blue Whale, Balaenoptera Musculus Near Cuddalore Coastal Region, Tamil Nadu, India; Dietary Composition of the Sea Catfish, Arius arius from Nagapattinam Coast; Water Analysis of Teok River Water and Awareness of Public on Water Pollution and its Quality Measures at Charaideo District, Assam; Length-weight Relationships of the Sea Catfish, Arius arius (Hamilton) from Nagapattinam Coast, Tamil Nadu; Sodium Dodecyl Sulphate Induced Histological Changes in the Liver of Puntius Parrah; Physicochemical Characterization of Gelatin Extracted from Indigenous Freshwater Fish (Cirrhinus reba-Hamilton, 1822) Bones; Some Detrimental Biochemical Influences of Arsenic on Freshwater Fishes; Oxidative Stress and Antioxidant Strategies; Checklist of Rotifers from Seasonal Wetland in Ambajogai, Maharashtra; Comparative Study of Cocoon and Hatching Success of Lampito Mauritii and Perionyx Excavatus Cultured in Different Cow Dung Media; Pesticides and Earthworms; Bibliography on the Rotifer Diversity in India