The Chesapeake Bay is a wondrous and exciting place to live. But oysters Chester and Meredith have a big problem: pollution in the waters of the Bay is making the underwater grasses sick. The grasses are home to so many young fish, crabs, and other creatures in the Bay; the disappearance of underwater grasses could lead to the sad loss of even more species. So much is at stake! How can Chester and Meredith possibly figure out a way to save the grasses and also the Bay? See how Chester and Meredith lead their underwater friends to clear up their messy and murky problem. Early reader?ges 5-8.