| Specimen ID | 1657388 |
| Group | Coelenterates-Hydrozoans |
| Genus | Craspedacusta |
| Species | sowerbii |
| Common Name | freshwater jellyfish |
| State | MA |
| County | Middlesex |
| Locality | Walden Pond |
| Mapping Accuracy | Accurate |
| HUC8 Name | Concord River |
| HUC8 Number | 01070005 |
| HUC10 Name | Sudbury River |
| HUC10 Number | 0107000501 |
| HUC12 Name | Hop Brook-Sudbury River |
| HUC12 Number | 010700050104 |
| Map | |
| Collection Day | 22 |
| Collection Month | 10 |
| Collection Year | 2020 |
| Year Accuracy | Actual |
| Potential Pathway | hitch hiker on waterfowl | hitch hiker on aquatic plants |
| Status | established |
| Comments | Walden Pond, 50 yards off the main beach |
| Record Type | NAS sighting report |
| Verifier | Wesley Daniel (USGS) |
| Freshwater/Marine | Freshwater |
| Number Collected | 10000 |
