For Marine biology this are some college

1) Pondicherry  University (Port Blair campus)

2) Karnataka University (dharwad)

3)Cochin University of science and technology

4) Pondicherry University (puducherry)

5) Annamalia University (Tamil Nadu)

6) College of science and technology (Andra Pradesh)

These are some good college you can prefer for Marine biology



For aquaculture

1) College of fisheries  (Mangalore Karnataka)

2) College of fishery science (pantnagar uttranchal)

3) Central institute of fisheries Mumbai

4) College of Fisheries Tripura

These are good college you can prefer for pg in aquaculture



Hope it will help you out!