Regardless of the type of system, it is considered a farm if humans manage the breeding, feeding, and growth of the fish. These farms use the same water and habitat as wild fish, but keep their fish in separate enclosures. Other fish farms follow similar principles, but use a cage system in a natural water source such as a lake or ocean. These farms manage their water (flow, oxygen levels, etc.) and the growth of fish from the fertilization of eggs until harvest. Fish-farming can involve raising fish commercially in tanks or other man-made enclosures such as ponds or concrete fish runs. Aquaculture is the farming of aquatic organisms such as fish, crustaceans, mollusks, and aquatic plants. The seafood we purchase at retail markets can come from a variety of sources. 3 The American Heart Association and the Dietary Guidelines for Americans recommends eating two, 3.5 ounce servings of fish per week. Seafood is also a primary food source of omega-3 fatty acids, EPA, and DHA. Compared to other sources of protein, seafood is low in calories and saturated fat and rich in key nutrients including zinc, magnesium, phosphorous, potassium, and vitamins A, B12, and D. Seafood (fish and shellfish) are a nutrient-dense source of dietary protein.
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