| Specimen ID | 621184 |
| Group | Coelenterates-Hydrozoans |
| Genus | Cordylophora |
| Species | caspia |
| Common Name | freshwater hydroid |
| State | CA |
| County | Contra Costa |
| Locality | Delta - Antioch |
| Mapping Accuracy | Accurate |
| HUC8 Name | San Joaquin Delta |
| HUC8 Number | 18040003 |
| HUC10 Name | Middle River-San Joaquin River |
| HUC10 Number | 1804000309 |
| HUC12 Name | Markley Canyon-San Joaquin River |
| HUC12 Number | 180400030907 |
| Map | |
| Collection Day | 1 |
| Collection Month | 1 |
| Collection Year | 1950 |
| Year Accuracy | Actual |
| Potential Pathway | shipping ballast water |
| Status | established |
| Reference 1 |
| Ref. Number: | 26266 |
| Author: | California Department of Fish and Game. |
| Date: | 2009 |
| Title: | California Aquatic Non-native Organism Database (CANOD). |
| Publisher: | California Department of Fish and Game, Office of Spill Prevention and Response. |
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| Record Type | Literature |
| Freshwater/Marine | Freshwater |