Pacific lamprey have lived on Earth for about 450 million years. When humans came along, a deep relationship formed between Pacific lamprey and Native American tribes across the western United States. But in the last few decades, tribal elders noticed that pacific lamprey populations have plummeted, due in part to habitat loss and dams built along the Columbia River. So today, an introduction to Pacific lamprey: its unique biology, cultural legacy in the Pacific Northwest and the people who are fighting to save it. (Encore)