| Specimen ID | 1809 |
| Group | Coelenterates-Hydrozoans |
| Genus | Blackfordia |
| Species | virginica |
| Common Name | Black Sea jellyfish |
| State | CA |
| Locality | Petaluma River |
| Mapping Accuracy | Approximate |
| HUC8 Name | San Pablo Bay |
| HUC8 Number | 18050002 |
| Map | |
| Collection Day | 10 |
| Collection Month | 9 |
| Collection Year | 1974 |
| Year Accuracy | Actual |
| Potential Pathway | shipping ballast water |
| Status | established |
| Reference 1 |
| Ref. Number: | 1383 |
| Author: | Mills, C.E., and F. Sommer |
| Date: | 1995 |
| Title: | Invertebrate introductions in marine habitats: two species of hydromedusae (Cnidaria) native to the Black Sea, Maeotias inexspectata and Blackfordia virginica, invade San Francisco Bay. |
| Journal: | Marine Biology |
| Volume: | 122 |
| Pages: | 279-288 |
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| Comments | Misidentified as Phialidium sp. Indicates this species may have been in the bay since 1970 and overlooked. |
| Record Type | Literature |
| Disposal | California Academy of Sciences |
| Museum Cat Number | CASIZ 094794 |
| Freshwater/Marine | Freshwater-Marine |
| Number Collected | 8 |
| Year Class | medusae |
