| Specimen ID | 291201 |
| Group | Crustaceans-Cladocerans |
| Genus | Bythotrephes |
| Species | longimanus |
| Common Name | spiny waterflea |
| State | IL |
| County | Cook |
| Locality | Little Calumet River, at O'Brien Lock and Dam south of Lake Calumet (north of Calumet City) |
| Mapping Accuracy | Accurate |
| HUC8 Name | Chicago |
| HUC8 Number | 07120003 |
| HUC10 Name | Calumet Sag Channel-Little Calumet River |
| HUC10 Number | 0712000304 |
| HUC12 Name | Grand Calumet River-Little Calumet River |
| HUC12 Number | 071200030407 |
| Map | |
| Collection Year | 2011 |
| Year Accuracy | Actual |
| Potential Pathway | shipping ballast water |
| Status | unknown |
| Record Type | Personal communication |
| Freshwater/Marine | Freshwater |
| Number Collected | <11 |
