Tasmania's salmon industry is booming but what about its environmental impact? | 7.30

The Maugean Skate is a prehistoric creature - a unique species of ray that is only found in Tasmania's Macquarie Harbour.
But its future could be at risk due to the booming salmon industry, leaving Environment Minister Tanya Plibersek with a very difficult decision to make. Ellen Coulter reports from Hobart.
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