Do sea lice actually kill young wild salmon? Industry and government say "there is no evidence', but in this episode the researchers are shocked to discover how much damage one louse has caused to one of their fish. Also, we dive with Dane Stobel into the deeper undersea gardens of the Broughton Archipelago. Featuring a performance of "the Salmon Swim Tonight" by the gumboot-clad "Broughton A cappella"