A Marine Biologist is someone who studies all types of sea creatures, and can choose to specialize in studying large ocean animals, all the way down to microscopic organisms. Everything from whales to the plankton they eat, and everything else in between, can be studied. Marine Biology is a learning and research field, and many marine biologists, therefore, work in coordination with universities and other educational institutions. In fact, many marine biologists are also teachers and professors during the winter months when less work is being done in the field. Research projects are at the heart of what most marine biologists do, whether it be actually collecting specimens in the field, compiling research data, finding real life applications for the research data, or classroom teaching. Another potential career for a marine biology graduate would be to become a hydrologist, which is a scientist or researcher that studies bodies of water and helps to find ways to eliminate water pollution. There are actually many environmental careers that can be attained with a degree in marine biology. Even a fish and game warden, which is something akin to an environmental police officer, is a possible career move for a marine biology graduate. Marine Biotechnology, one of the possible specializations, involves developing and testing new drug treatments and protocols that are derived from ocean life. Another specialization is molecular biology, which is helpful in identifying microorganisms as well as diagnosing diseases that are caused by microorganisms.