Marine Molecular Biology is an important area of specialization in this field of Marine Biology. The use of molecular biology in marine sciences is growing and will continue to see significant advances in the near future. Researchers apply molecular approaches and techniques to many different kinds of environments and many different organisms, from microscopic bacteria, plants, and animals to marine mammals. For instance, Molecular biology can be used to identify the presence of a specific organism in a water sample. It can also be used to study diseases in organisms.