The Great Lakes of North America have seen invasions by many species that have had enormous deleterious effects. Many people have heard about the Sea Lamprey, which ate economically important fish. But the Quagga mussel takes away the food of the food of the food that they young fish eat. Apparently they can filter the entire volume of the Great Lakes every two weeks! https://www.wpr.org/environment/drebert-melnick-documentary-quagga-mussels-great-lakes
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“ The resulting three-part series, “All Too Clear: Beneath the Surface of the Great Lakes,” uses cutting-edge underwater drone technology to capture life hundreds of feet below the surface of the world’s largest freshwater ecosystem, resulting in what the filmmakers believe to be the first shots of whitefish spawning in the wild.”
This is SO fascinating thank you for sharing this documentary with us!
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