Dear Aspirant, the fishery science or technology is having a vast opportunities now a days, not in India but all over the world. The fish science is the study of fish habits, fish nutrition, fish genetics, fish breeding. There are many top colleges and universities in the world, the list is as follows:
1. Hull International Fishery Institute, (HIFI), University of Hull; the institute was established in 1989, and is concentrating on fish conservation and aquatic resource management. The program specializes in applied research and and sustainable development. The institutes maintains links with many internationally renowned institutes for quality research.
2. Quinny College of Natural Resources, Utah State University. The college provides necessary skills to study fresh water fishes, the relationship among chemical, biological and physical components of aquatic ecosystem. The students here learn to restore endangered fish populations, manage lakes and reservoirs and to improve water quality.
3. Applied marine and fisheries ecology, The University of Aberdeen, The courses offered are; Marine ecology and ecology system management, Fish Biology, Population ecology, Fisheries technology and survey, Fishery analysis and stock assessment.
4. Department of Fisheries and Wildlife, Oregon State University
5. Ocean University of China
6. Deakin University

7. The College of Aquatic and Fishery Sciences, The Washington State University, Seattle . This school offers multidisciplinary programs, which covers all major subjects of Fish sciences.
8. Department of Wildlife and Fishery Sciences. Texas A&M College of Life sciences. The department deals with the ecology, management and conservation biology of Fish sciences.
9. School of Fishery Sciences, Hokkaido University, Japan, The school is working on research and sustainable reproduction, and efficient use of marine and inland resources, The institute is also working on Fish nutrition, fish breeding and management.
10. Aquaculture and Fishery Science, The University of Rhode Island, field of study are; exploration of marine bio resources, fish habitat, living aquatic resources, world fishing methods, Interaction between fisheries and protected species. Crustaceans aquaculture, design of fish capture system, aquaculture and the environment, ecological aquaculture, marine fin fish aquaculture, aquatic food quality and processing.
There many other universities all over the world and in India, where you can get quality education in Fishery Sciences.

Good Luck...