. Farming Methods Seawater ponds In seawater pond mariculture, fish is raised in ponds which receives its water from the sea. This has the benefit that the nutrition (eg microorganisms) present in the sea water can be used. This is especially a great advantage over traditional fish farms (eg sweet water farms) of which the farmers often need to buy feed themselves (which is expensive) and supply them manually to the fish. Other advantages are that waterpurification plants may be planted in the… (More on Mariculture)