What do quagga and zebra mussels look like?
Quagga and zebra mussels are commonly called ‘bivalves’, meaning they have two shells (or valves). Shell color and patterns vary from a dark striped pattern, to a light tan shell with zig-zag stripes, to completely brown or light colored with little striping. These mussels have byssal threads, which allow them to attach to hard surfaces such as boats. Quagga and zebra mussel larvae are microscopic, while adults may be up to two inches long. They are usually found in clusters and may live 4 to 5 years.