June 26 - July 2 Discover Nature this week as you help to stop one of Missouri’s Most Unwanted invasive species, the zebra mussel. Zebra mussels are fingernail-sized, black-and-white striped mollusks native to the Caspian Sea region of Asia. Over the next several decades, zebra mussels could spread to other freshwater locations in Missouri and throughout North America. You can help prevent the spread of zebra mussels by observing the following "clean boating" suggestions when transporting your