NPS, Multi-agency zebra mussel dive team
Native Freshwater Mussels
The St. Croix has is known for having a mostly intact mussel population. Meaning, the species that lived here 100 years ago are still the species living here today. This includes 40 species of mussels, two of which are on the endangered species list. To see a list of the mussel species in the St. Croix, print a mussel fact sheet, or to learn more... about mussels
Female mussels need to find a fish to carry their glochidia, (baby mussels) for a few weeks. Then the young can survive on their own and will drop to the river bottom. Different mussel species use different methods to attract the fish and some are very picky as to what kind of fish they want to attract. Watch some videos of different mussels trying to attract a fish.
Did You Know?
The Old Man of the Dalles is one of the many features visitors can see looking at the rocks in the Dalles, or rocky gorge, of the St. Croix River. A great way to view these rocky features, as well as St. Croix NSR, is from the water in a boat or a canoe.