Did You Know?
![Did You Know? Mussel fact](https://d9-wret.s3.us-west-2.amazonaws.com/assets/palladium/production/s3fs-public/styles/full_width/public/thumbnails/image/mussels_umrs_600.gif?itok=ja44K9oq)
Detailed Description
Did You Know? Across the 480 km reach from Upper Mississippi River Pool 5 to Pool 18 the total water filtration by mussels is about 75 times that of a large metropolitan wastewater treatment plant in the Midwest.
Sources/Usage
Public Domain.