Mariculture refers to aquaculture practiced in marine environments. Mariculture refers to aquaculture practiced in marine environments and in underwater habitats. Phytoplankton are a key food item in both aquaculture and mariculture. Fish farming is the principal form of aquaculture, while other methods may fall under mariculture. Coastal aquaculture (or mariculture) is almost absent in Pakistan despite its potential. It is the principal form of aquaculture, while other methods may fall under mariculture. To illustrate, consider a benthic ecological impact study for a hypothetical shellfish mariculture facility. Mariculture, including oysters, shellfish and fish, is also showing promise. Mariculture is the culture of marine organisms in seawater. Farming in the sea (mariculture) for king salmon is sometimes called sea-cage ranching. In seawater pond mariculture, fish are raised in ponds which receive water from the sea. The Pacific oyster has been grown in the outflow of mariculture ponds. This farming in a marine environment is known as mariculture. Several sites off the coast of the peninsula serve for mariculture cultivation of mussels. Sustainable mariculture promises economic and environmental benefits.