|This is the green
mussel, Perna viridis, a tropical marine species. However, these were spotted in Minnesota
believe it or not. They were spotted by inspectors on a large tug-like boat
who were looking for zebra mussels.
The Minnesota DNR suspected what they might be so they sent me a
picture. I identified them as green
mussels based on the photo and also knowing that the boat had been in
Florida. Although they would not have survived in North Dakota, this is still
a good example of how organisms can get spread overland. This could someday
be zebra mussel going in the opposite direction.