Oct 25 Environment Endangered Mussels Released in the Green River State and federal biologists have released more than 100 endangered mussels into the Green River by Mammoth Cave National Park. The pink mucket mussel is a federally endangered species. The mussels used to be abundant in the Green River, but pollution and human interference with the water’s flow decimated the population. Now, scientists hope they […] By Erica Peterson Oct 25 Environment Endangered Mussels Released in the Green River Erica Peterson