ImageSource: legit.ng Fish farming or pisciculture involves raising fish commercially in tanks or enclosures such as fish ponds , usually for food. It is different from aquaculture , which is the farming of aquatic animals such as fish, crustaceans, molluscs and so on. A facility that releases juvenile fish into the wild for recreational fishing or to supplement a species' natural numbers is generally referred to as a fish hatchery . Worldwide, the most important fish species produced in fish farming are carp , tilapia , salmon , and catfish . [1] Culled from Wikipedia.