Which organism was introduced into the great lakes and has expanded its range to the mississippi river?

The zebra mussel (small shellfish named for the striped pattern of its shell) was introduced into the great lakes and has expanded its range to the Mississippi river. They made their way ot of the Lake in 1992 into the Mississippi River in 1992 basin via the Chicago Sanitary Shipping Canal. The zebra mussel has cost businesses and communities over $5 billion since their initial invasion