Like it or not, our seafood increasingly originates not in the deep ocean but on fish farms hugging the coasts. Aquaculture already supplies about half of the world’s seafood, and global production is going to have to more than double by 2050 to meet demand, according to the World Resources Institute.
The business opportunity here is tremendous. Thousands of operations around the world now produce huge numbers of salmon, shrimp, mussels, tilapia and catfish, to name a few fish species that thrive on farms.
Not without significant cost, though — from pollution to antibiotic overuse to slavery, the global industry is rife with problems. But there also plenty of examples of fish being farmed in a way that may not endanger wild populations, deplete the ocean of them for feed or generate a lot of nasty waste.