| Specimen ID | 4920 |
| Group | Crustaceans-Cladocerans |
| Genus | Cercopagis |
| Species | pengoi |
| Common Name | fishhook waterflea |
| Country | Canada |
| State | ON |
| Locality | Lake Ontario approximately 2 km north to Bluffers Park in Scarborough, Ont. |
| Mapping Accuracy | Approximate |
| HUC8 Name | Lake Ontario |
| HUC8 Number | 04280002 |
| Map | |
| Collection Day | 19 |
| Collection Month | 8 |
| Collection Year | 1998 |
| Year Accuracy | Actual |
| Potential Pathway | shipping ballast water |
| Status | established |
| Comments | Many similar reports fromboaters in this area. Female in sample had nesting eggs. |
| Record Type | Personal communication |
| Disposal | preserved |
| Museum Cat Number | OFAH, Peterborough, Ontario |
| Verifier | Beth MacKay, Ontario Federation of Anglers and Hun |
| Freshwater/Marine | Freshwater |
| Number Collected | 100s |
| Year Class | adult |
| Size | 10 mm |
