When would you use marine as an adjective?

Marine as an adjective is used to describe something related to the sea. It can be used to refer to animals or plants that live in the ocean, such as marine life or marine vegetation. It can also be used to refer to human activities that take place on or in the ocean, such as marine trade or marine exploration. Additionally, it can be used to describe objects or structures that are used in or on the water, such as marine vehicles or marine equipment. The term "marine" encompasses everything from the surface of the ocean to the depths of the sea floor.