Biology is the study of life forms and in this undergraduate course the students will be studying life history events of fishes, including shellfishes in the context of fisheries and important aquaculture species. The main aim of this course is to introduce the immensely fascinating world of fish biology, to give advanced information on the unique adaptations of various biological systems of fish and shellfish, to provide basic practical skills in different aspects of aquatic biology such as sampling of fish and shellfish, quantitative meristic and morphometrics, comparative studies on gills, scales, pharyngeal teeth and brain of fishes and to understand the principles of aquatic biology life in freshwater; lentic and lotic environments, freshwater wetlands will be discussed in this course.