In marine science you will learn about the ocean and the life within it. You will also learn about how the ocean food chains and ecosystem works. This class is all about the ocean and life within it. The class is a pretty easy class to take to give you one of your science credits. All grades can take marine science as a class. This is a full year class meaning it lasts the whole year not just one semester. You learn about different organisms of the ocean and how they function, for example how they eat, sleep, move, and reproduce. In marine science you also learn about what roles different organisms play in their ecosystem.