Our Changing World: Our rarest freshwater fish
Our Changing World heads to the Mackenzie region in the South Island to meet one of New Zealand's rarest fish – the lowland longjaw galaxias.
Dean Nelson, a senior biodiversity ranger at the Department of Conservation, has been looking out for these tiny fish for two decades.
Producer Karthic SS has this story, and he joins Dean during one of his monitoring trips at a place called Fraser Stream, near Twizel.
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