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<p>Speckled, pencil-thin and sporting an underbite: the lowland longjaw galaxias is New Zealand’s rarest freshwater fish species. With just seven known populations, this species is considered nationally endangered. Join producer Karthic SS at a spring-fed stream in the wild Mackenzie Basin to meet the tiny fish, hear from a researcher studying trout-proof barriers, and chat to a ranger who for 20 years has cared for the little fish he calls 'Jaws'. </p><p><strong><em><a href="https://radionz.us6.list-manage.com/subscribe?u=211a938dcf3e634ba2427dde9&id=81ad21bafe">Sign up to the Our Changing World monthly newsletter</a> for episode backstories, science analysis and more.</em></strong></p><p><strong>Guests:</strong></p><ul><li>Dean Nelson, Senior Ranger, Biodiversity, Department of Conservation</li><li>Martha Jolly, PhD candidate, University of Canterbury</li></ul><p><strong>Learn more:</strong></p><ul><li>Read the article that accompanies this episode: <a href="https://www.rnz.co.nz...