  Marine Biology is studied because we want to know more things about marine mammals and fish. Also to get to know the eco-system and the life of fish. With-out marine bio … logy we will not know anything about the ocean and what lies beneath it.3 people found this useful.he first degree you would get to become a marine biologist is a Bachelor of Science in Marine Biology, or a Bachelor of Science in Biology with an emphasis in Marine Biology. … for further degrees you would need to go to graduate school to get your Masters in Marine Biology.