Fish may be confined in earth ponds, concrete pools, barricaded coastal waters, or cages su....

Fish may be confined in earth ponds, concrete pools, barricaded coastal waters, or cages suspended in open water. While most fish farming is devoted to the commercial food market, many governmental agencies engage in it to stock lakes and rivers for sport fishing; there is, in addition, a steady commercial market for goldfish and other decorative fish for home aquariums. Aquaculturists also raise bait fish for both sport and commercial fishing. The young fish are bred in the controlled environment and when sufficiently mature are released into the open sea.