| Specimen ID | 1695335 |
| Group | Coelenterates-Hydrozoans |
| Genus | Craspedacusta |
| Species | sowerbii |
| Common Name | freshwater jellyfish |
| State | MA |
| County | Middlesex |
| Locality | Walden Pond |
| Mapping Accuracy | Approximate |
| HUC8 Name | Concord River |
| HUC8 Number | 01070005 |
| Map | |
| Collection Day | 13 |
| Collection Month | 10 |
| Collection Year | 2021 |
| Year Accuracy | Actual |
| Potential Pathway | hitch hiker on aquatic plants | hitch hiker on waterfowl |
| Status | established |
| Comments | sighting of 3 individual jellyfish the size of my fingernail. 25 yards off north shore of Walden Pond about 1/4 way east of bathing beach. |
| Record Type | NAS sighting report |
| Verifier | Wesley Daniel (USGS) |
| Freshwater/Marine | Freshwater |
| Number Collected | 3 |
