| Specimen ID | 1895985 |
| Group | Mollusks-Bivalves |
| Genus | Dreissena |
| Species | polymorpha |
| Common Name | zebra mussel |
| State | SD |
| County | Day |
| Locality | Horseshoe Lake |
| Mapping Accuracy | Accurate |
| HUC8 Name | Upper Big Sioux |
| HUC8 Number | 10170201 |
| HUC10 Name | Grass Lake |
| HUC10 Number | 1017020104 |
| HUC12 Name | Horseshoe Lake |
| HUC12 Number | 101702010402 |
| Map | |
| Collection Year | 2025 |
| Year Accuracy | Actual |
| Potential Pathway | hitch hiker | dispersed |
| Record Type | Personal communication |
| Verifier | South Dakota Game, Fish and Parks |
| Freshwater/Marine | Freshwater |
