Salmon in future may be farmed on land
In a series of indoor tanks 40 miles south west of Miami, Florida, five million fish are swimming in circles a very long way from home. The fish in question are Atlantic salmon, which are far more typically found in the cold waters of Norway's fjords or Scotland's lochs.
As the species is not native to Florida, and would be unable to cope with the state's tropical heat, the water tanks are kept well chilled, and housed in a vast, air-conditioned and heavily insulated warehouse-like building – and all the waste is sold as fertiliser instead of being dumped on the ocean floor. The facility intends to be the world's largest land-based fish farm.