How massive, feral goldfish are threatening the Great Lakes ecosystem

For many people, the humble goldfish is their first pet. Swimming in a tank in your house, it’s hard to imagine it’s much of a threat. But released into the Great Lakes, this iconic fish can imperil the fragile ecosystem of the largest freshwater system in the world. Christopher Booker has the story. Subscribe: Newsletters: PBS NewsHour podcasts: Stream your PBS favorites with the PBS app: Find more from PBS NewsHour at Subscribe to our YouTube channel: Follow us: TikTok: @pbsnews Twitter: Instagram: Facebook: