Foreign companies now own Tasmania's big three salmon farming operations. Here's a look at how industrial fish farms are run ...

In Iceland, salmon is reared on closed net farms on land, while Norway is trialling ... Farmed fish are also selectively bred and genetically different to Atlantic salmon, but they can interbreed ...

Well, according to Lingalaks fish farms in Norway, which produce nearly three ... And in Florida, a firm called Atlantic Sapphire is hoping to construct a giant salmon farm - on land.

Nordic Aqua Partners, which operates a large land-based salmon farm in northern China, has said it is revising its production in order to grow fish to a larger size.