Oceanography

The university does not offer any such course. Kindly refer to the link below:
https://www.unigoa.ac.in/academics/programmes/masters.html

Eligibility: Mandatory Subjects in class 12: Physics, Chemistry, Mathematics, Biology.
You can apply online with the required information. Final selection is based on the performance in the Personal Interview.

Oceanography courses in India are also referred as marine courses in India, mostly because they deal with the study of the sea. Oceanography is defined as a branch of science that deals with the physical and biological properties and phenomena of the oceans. Oceanography professionals are known as oceanographers.

Please refer to the link provided below for details regarding admissions for M.Sc in Marine Biology and Oceanography in Annamalai University. You can download their brochure which contains accurate information regarding course eligibility, admissions etc. from the institute in question.
https://www.shiksha.com/science/course/m-sc-marine-biology-oceanography-annamalai-university-tamil-nadu-other-169929

Yes, you can proceed for oceanography after having done your BA in geography, but I am not sure about Marine Biology.

Hi Olivia Noeline,
B.Sc in Oceanography is available in Jaipur and Bareilly other than Tamilnadu.

The Goa University doesn't offer M.Sc. in Oceanography. Kindly refer to the link below:
https://www.unigoa.ac.in/department-of-marine-sciences.html.