Aquaculture is what it sounds like—agriculture in water. The practice of growing fish, water plants, and shellfish instead of gathering them from the wild has been growing in popularity for decades, both industrially and in home settings, and has expanded to include combinations of species from aquatic ecosystems and traditionally land-based farming. The possibilities are myriad, from recreational design, to sustainable homesteading, to commercial farming, and the technology and community resources are improving steadily.
