| Specimen ID | 4999 |
| Group | Crustaceans-Cladocerans |
| Genus | Cercopagis |
| Species | pengoi |
| Common Name | fishhook waterflea |
| Country | Canada |
| State | ON |
| Locality | Lake Ontario, 30 km West to Port Milford, between False Duck Island, Yorkshire and Main Duck Island |
| Mapping Accuracy | Approximate |
| HUC8 Name | Lake Ontario |
| HUC8 Number | 04280002 |
| Map | |
| Collection Month | 8 |
| Collection Year | 1998 |
| Year Accuracy | Actual |
| Potential Pathway | shipping |
| Status | established |
| Record Type | Personal communication |
| Verifier | Jim Hoyle, Fisheries Assessment Unit, Picton, Onta |
| Freshwater/Marine | Freshwater |
| Number Collected | 100s |
