As farmers come under attack from environmentalists, many are turning to farming the sea. Euan Mcllwraith takes a look at fish farming: from the invisible oyster farm to the high-tech salmon that travel by helicopter.
Producer Tim Finney
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As farmers come under attack from environmentalists, many are turning to farming the sea. Euan Mcllwraith takes a look at fish farming: from the invisible oyster farm to the high-tech salmon that travel by helicopter.
Producer Tim Finney