Zebra mussels are ravenous filter-feeding organisms. They are small in size, about 1-2 inches, and have tiny stripes down their shells, giving them their name. Zebra mussels use their byssal threads, or string, to attach to a variety of surfaces, including anchors, docks and other mussels.

Zebra mussels have continued to spread throughout American waters since their invasion in 1986. They most likely transport themselves by hitching a ride on boat trailers, anchors and chains and other watercrafts.