Marine industry can be divided into three main categories.
1.Primary industrial sector
Extracts raw materials (which are natural products) from the sea, such as fisheries (including fishing and mariculture), mining, seaweed farming, etc.
2.Secondary industrial sector
Converts the raw materials provided by primary industry into commodities and products, such as shipbuilding, engineering, sea salt production, petroleum exploitation, ocean energy utilization, etc.
3.Tertiary industrial sector
This sector provides services to the general population and to businesses, such as marine transportation, marine recreation, marine biotechnology, etc.