| Specimen ID | 4049 |
| Group | Crustaceans-Cladocerans |
| Genus | Bythotrephes |
| Species | longimanus |
| Common Name | spiny waterflea |
| State | MN |
| Locality | Lake Superior |
| Mapping Accuracy | Approximate |
| HUC8 Name | Lake Superior |
| HUC8 Number | 04180000 |
| Map | |
| Collection Day | 22 |
| Collection Month | 4 |
| Collection Year | 1988 |
| Year Accuracy | Actual |
| Potential Pathway | shipping ballast water |
| Status | established |
| Comments | First observed in Lake Huron in 1984. Spread to all 5 Great Lakes in 3 years and is the dominant and preferred food of white perch, yellow perch, juvenile walleye, and juvenile coho salmon. Also caused restructuring of plankton community. |
| Record Type | Personal communication |
| Freshwater/Marine | Freshwater |
