Aquaculture is the farming of fish, crustaceans, molluscs, aquatic plants, and other aquatic organisms. Aquaculture involves cultivating freshwater and saltwater populations under controlled conditions, and can be contrasted with commercial fishing, which is the harvesting of wild fish. It is commonly known as aquafarming. According to the Food and Agriculture Organization (FAO), aquaculture, is understood to mean the farming of aquatic organisms including fish, molluscs, crustaceans and aquatic plants. Farming implies some form of intervention in the rearing process to enhance production, such as regular stocking, feeding, protection from predators, etc. Farming also implies individual or corporate ownership of the stock being cultivated.To come up with new research trends in fisheries we have designed a book- CONTEMPORARY TRENDS IN FISHERIES AND AQUACULTURE. The 28 chapters of this book are a serious work done by researchers, scientists in the field of fisheries and aquaculture. The book covered a wide spectrum of subject related topics such as distribution of aquaculture organisms in world, fishes migration, habitat ecology of crabs, aqua plants and their medical importance. Some chapters deals with various concepts of aquaculture organisms such as probiotics use in aquaculture, zooplanktons abundance, reproductive system, circulatory system, effects of some harmone on aquaculture organisms and parasites that invade aquaculture organisms. The contributed authors have also worked on serious environmental issues such as assessment of drinking water, microbial quality of fishes, status of fish diseases, and effects of physico-chemical parameters of river regulation etc. The proceedings of this book describe an attempt for interaction by the juxtaposition of researchers in aquaculture that provided an opportunity for presentations, discussion, and interaction of mutual benefit to the readers. It is hoped that the book- CONTEMPORARY TRENDS IN FISHERIES AND AQUACULTURE accompany recommendations on future work and research priorities with a modest but useful steps toward supporting the safe and sustainable expansion of aquaculture in developing countries. Much more research is needed and this will require an increased commitment of resources. We are thankful to all the authors and other contributors for giving their valuable time and data. They are responsible for the work presented in the paper and if any plagiarism question arises they are answerable. The 1st author or corresponded author has to take responsibility. The editiors are not responsible for above issues. We are thankful to ISCA, Kolkata, ISCA President, General Secretaries , ISCA Executive Committee Members, and office bearers of the Indian Science Congress held at Manipur University, Imphal, Manipur from March 16 to 20, 2018 for encouraging us to hold symposium with focal themes, "REACHING THE UNRECAHED". We extend our sincere thanks to all contributors who have contributed their articles for publications in these proceedings. This book will be very useful for researchers, scientists, students and all such entrepreneurs who are working in the field of public health.