What a person in this career does:
Marine life is a vast resource, providing food, medicine, and raw materials, in addition to helping to support recreation and tourism all over the world.
Marine biology covers a great deal, from the microscopic, including most zooplankton and phytoplankton to the huge cetaceans (Whales).
The habitats studied by marine biology include everything from the tiny layers of surface water in which organisms and abiotic items may be trapped between the ocean and atmosphere, to the depths of the oceanic trenches. It studies habitats such as coral reefs, kelp forests, tidepools, muddy, sandy,and rocky bottoms,and the open ocean zone.