Most of the world’s aquaculture production is freshwater fish. Nearly 40% of that is carp, mainly in China. In North America, aquaculture is dominated by US catfish farms which produce around 136,000 tonnes annually.
Diadromous fishes, which are fish with a freshwater and saltwater phase, make up only a small part of global production at 7%.
And farmed Atlantic salmon, the most talked-about and scrutinized form of aquaculture in the world, make up only 3% of the world’s global aquaculture production.